Research libraryUtilisation Decides
Chapter 10 of 14 · Part III · Draft web edition
Small batches become practical when style changes are short, methods are standard and the layout lets qualified operators share work around the constraint.
The cloth is woven from this chapter's 6 exhibits: each weft is one exhibit's own data, normalised; each warp group is a section. The probe reads the exhibit's own value where it crosses. Procedural visualisation, not a measurement.
Read-out
Illustrative task plan. Before: preparation 0 to 20, adjustment 20 to 35, approval 35 to 45. After: preparation -20 to 0, adjustment 0 to 15, approval 15 to 25. Same task durations; interruption falls from 45 to 25 minutes only if advance preparation does not reduce outgoing production. Not a resource or dependency solver.
Unit: illustrative minutes relative to last good piece. Status: illustrative. Sources: S25. Illustrative figures are teaching examples, not measured factory results.
Overture · 1 min
Small batches pay when the value of earlier, dependable delivery exceeds the extra cost of changing products, preparing materials and restarting good production. GFT's proposed method is to shorten the stopped interval, stabilise the restart, and place compatible operations close enough for qualified people to share work. Batch size then follows from a feasible production schedule and an explicit economic comparison. A cell outline or a faster machine adjustment alone cannot establish that comparison. This chapter supplies a decision method, with constructed calculations clearly separated from published evidence.
10.1
Related · chapter 018 paragraphs step it
Read-out
GFT proposed review sequence: check time losses, labour content and flow, then choose an action. OEE, earned minutes and stable-system WIP relationships remain distinct measures. Arrows indicate review order, not material flow or a combined score. This is not an implemented platform.
Unit: illustrative measurement design. Status: illustrative. Sources: S04, S13, S22. Illustrative figures are teaching examples, not measured factory results.
Read this exhibit in its chapter ↗The Lean Enterprise Institute describes SMED as equipment changeover reduction through separating tasks that require a stopped machine from preparation possible while it runs, then converting internal work to external work where feasible. Its single-digit-minute ambition is a method's target, not evidence that a particular garment change can meet it. The relevant distinction is whether production must stop for the task, rather than whether somebody performs the task near a machine.[S25]
GFT recommends beginning with observation of a complete style transition. Follow the outgoing order until its last accepted garment, and follow the incoming order until its first accepted garment. Record intermediate events rather than treating the change as an indivisible stop. Include outgoing material clearance, settings, attachments, thread changes, trial sewing, inspection and release. Keep subsequent recovery to a stable production rhythm as a separate interval. This proposed boundary makes it possible to distinguish a short adjustment from a long return to reliable output.
For each observed task, the industrial engineer should ask what prevents earlier completion. A folder might need fitting during the stop, while its identity, condition and availability can be confirmed beforehand. Thread can be presented in advance without threading a running machine. An operator briefing can occur before the transition if there is safe cover for current work. These are proposed garment applications of the internal and external distinction, subject to the machine's instructions and the actual process. Externalising a task never authorises unsafe intervention.
Preparation needs its own capacity budget. Moving work outside the stopped interval does not remove its labour, inspection or storage requirements. GFT recommends recording the preparer's time, location and competing responsibilities alongside the production clock. If preparation takes a qualified operator away from the current constraint, the apparent improvement may have consumed good output before the measured stop begins. The comparison should therefore preserve both elapsed interruption and total paid effort, with an explicit explanation when they move in opposite directions.
In the illustrative schedule in Exhibit 45, preparation originally occupies the first 20 minutes after the last good piece. Relocating it to the preceding 20 minutes leaves 15 minutes of stopped adjustment and 10 minutes of trial and approval. The assumed interruption falls from 45 to 25 minutes. These invented durations isolate external preparation only: they do not assume faster adjustment, extra people or relaxed inspection. The schedule assumes the same preparer can work before the stop without reducing current production.
The proposed release check occurs before the outgoing run ends. Planning confirms the authorised next style and revision; materials confirms the kit; maintenance confirms required equipment condition; supervision confirms qualified staffing; quality confirms the acceptance reference. A missing item remains visible as an unready transition. Stopping the line to discover which revision applies is a different failure from a difficult physical adjustment. The improvement log should retain that distinction so the responsible function can change its preparation method.
GFT proposes a physical readiness kit with a matching information record. The kit should identify the next authorised style, the approved revision, required consumables and the person who checked completeness. Keep trial material distinguishable from saleable work and give unused components an explicit return route. A kit that is complete when assembled may become incomplete if another line borrows an attachment. The readiness check should therefore occur at the agreed release event, with ownership of subsequent changes. This is a proposed control against rediscovery during the stop, not a requirement to duplicate every tool or carry unrestricted spares. Compare any duplication cost with the delay it is intended to avoid.
Sequence also needs attention. GFT recommends mapping transitions by product family, since a change between similar operations need not resemble a change requiring different attachments and skills. Record the direction of each transition and retain exceptions. A quick outward change does not prove a quick return. Grouping compatible work can be tested, but order priority and promised delivery must remain constraints. The purpose of preparation is to make authorised demand easier to serve, rather than to manufacture convenient products without a downstream requirement.
10.2
Read-out · sourced
Sousa and colleagues, 2018, cork-stopper equipment case. This published non-apparel result is not a GFT result, garment benchmark or predicted Cameroon improvement.
Unit: reported reduction in total changeover time. Status: sourced. Sources: S1001.
A published cork-stopper equipment study reports a 43 per cent reduction in total changeover time after applying SMED. This is manufacturing evidence from cork production, not apparel evidence or a Cameroon factory result. The authors studied an existing process and its working conditions. Their result supports testing changeover improvement as a mechanism; it does not provide a percentage to insert into a garment forecast.[S1001]
The sourced figure in Exhibit 46 deliberately retains that boundary. It reports a change in changeover time, with no conversion to garments, profit or national productivity. Such conversions would require further inputs about production rate, demand, labour, materials and the affected resource. GFT's proposed garment test should collect those inputs directly, rather than attach them to a result from a different manufacturing process.[S1001]
GFT recommends defining capacity released at the resource that actually limits the delivery schedule. If an attachment change stops only an unconstrained feeder while its buffer supplies the line, shortening that stop may not add finished garments. If the same change stops the governing sewing resource and material is ready, the released interval may permit extra output. These are conditional scheduling statements. A trial should show which condition applies through time records and downstream good-output reconciliation, rather than value every minute as interchangeable capacity.
The financial treatment should be stricter than the capacity calculation. GFT recommends classifying released time by its actual use: additional contribution from accepted deliveries, paid hours genuinely avoided, contingency against a late order, or idle time. Salaried labour retained on the same schedule is not automatically a cash saving. Additional output that merely waits in finished stock is not automatically revenue. A proposal can still have value through delivery reliability, but the decision record should state that value separately and explain the evidence needed to price it.
GFT recommends keeping labour concurrency visible in the trial record. If a technician and an operator work safely in parallel, elapsed time can fall while combined labour effort rises or remains unchanged. Record each person's task interval and identify the work they would otherwise have performed. Conversely, a single shared technician cannot prepare several simultaneous transitions merely because the scheduling diagram contains overlapping bars. Resource availability should be reconciled across affected lines before the promised capacity is accepted. This protects the estimate from depending on support that was present for the demonstration but is unavailable during the next ordinary production period.
Changeover should also have a repeatability test. GFT recommends comparing like transitions, retaining product revision, team composition, machine condition and material readiness. Record the distribution of durations rather than only a favoured demonstration. A faster transition supported by unusually intensive engineering attention may be useful learning, but its staffing assumption must remain visible. The operating standard should describe who can repeat the method during ordinary production and which support must be booked. Savings remain provisional until routine shifts can reproduce them.
10.3
The Lean Enterprise Institute places takt, work sequence and standard in-process inventory at the centre of standardised work. Its guidance treats the resulting documents as a baseline for continuing improvement, with training and quality requirements supported by associated work standards and job instructions. This is a useful foundation for a changeover standard because the new running condition matters as well as the adjustment sequence.[S26]
GFT proposes a changeover sheet linked to the current operation bulletin. It should name the outgoing and incoming configurations, required attachments, material identities, ownership of each action and the point at which inspection authorises release. Use a controlled revision that can be read at the workstation. Include the abnormal condition that requires escalation and the temporary method that is permitted while waiting. A record that merely says to set up correctly transfers the decision back to the operator without supplying the necessary engineering definition.
The proposed checklist in Exhibit 47 separates evidence of readiness from evidence of acceptance. It is a design template, not an observed GFT operating procedure. Each row needs a local instruction with product-specific details before production use. The owner named by role performs or confirms the check; the event record preserves who actually did so. Assignment of responsibility should therefore be accompanied by access to the approved sample, tools and authority required to act.
Read-out
| Ready to stop | Supervisor | Kit and revision checked |
|---|---|---|
| Safe to adjust | Technician | Isolation confirmed |
| Ready to trial | Operator | Settings recorded |
| Good piece accepted | Quality | Sample result retained |
| Stable handover | Supervisor | Pace and issues logged |
Illustrative GFT checklist derived as a proposed application of standard-work principles. Local machine instructions and product acceptance rules must supply the detailed criteria. This is not a completed factory procedure.
Unit: proposed control points. Status: illustrative. Sources: S26. Illustrative figures are teaching examples, not measured factory results.
GFT recommends distinguishing the first accepted piece from stable output. An accepted sample proves that a piece met its stated checks at that event. It does not establish that the whole line can maintain the required pace or that later bundles are correctly identified. The handover should therefore preserve an agreed observation boundary for pace, quality and unresolved faults. This chapter proposes that control boundary; the adjacent quality chapter owns detailed defect classification and corrective-action methods, which need not be recreated inside the changeover sheet.
Standard in-process stock should be a purposeful part of the restart method. Specify where permitted stock sits and how it remains identified through the transition. Keep outgoing components separate from incoming components until disposition is clear. If buffer stock is used to protect a downstream process, include its preparation and clearance in the comparison. Otherwise an apparently uninterrupted line may have borrowed from inventory built earlier. The proposed method is to reconcile stock movement with the production clock, rather than infer flow from the absence of a visible stop.
After each trial, GFT recommends reviewing the sheet with the people who performed the work. Preserve deviations that prevented safe or correct execution, and distinguish a missing instruction from a deliberate improvement. A revised method should be authorised before it replaces the current one. Training should use the actual attachment, material presentation and inspection reference intended for production. An operator should be able to explain both the sequence and the condition that requires stopping. The sheet is useful when it supports that judgement under ordinary conditions.
The proposed event record should be short enough to complete during production but detailed enough to reconcile later. Link the order, operation-bulletin revision and equipment identity to the readiness, stop, acceptance and stable-handover events. Preserve the reason for any missing timestamp instead of silently reconstructing it as measured fact. GFT recommends separating operator entry from supervisory correction and retaining the original value when a correction is justified. This chapter specifies the decision meaning of those fields; data governance and platform architecture belong elsewhere in the paper library. A manual record remains suitable for the trial if it supports the same traceable boundary.
Exceptions need controlled treatment. A missing spare, a changed fabric response or an absent qualified operator may make the planned method infeasible. GFT proposes recording the exception, its temporary approval and the order affected, then revising the next transition estimate if the condition persists. Concealing exceptions inside a shortened average would weaken the schedule. Equally, an isolated abnormality should not automatically become permanent allowance. Separate the repeatable method from the unresolved cause so planning can use a realistic range while engineering works on removal.
Interlude · the cloth half-woven
Woven: sections 10.0 to 10.3Still to weave: 10.4 to 10.6
Read-out
Sourced from World Bank research and Enterprise Survey indicators: unconditional average revenue-based total factor productivity (TFP) gap for outage-exposed manufacturers across 84 developing countries, 2006 to 2019 (S36); share of surveyed Cameroon firms experiencing electrical outages in 2024 (S0301); and average value lost due to electrical outages as a share of sales for affected Cameroon firms in 2024 (S0302). Cross-country and sector-aggregate figures are context, not a single-factory garment forecast.
Unit: percent. Status: sourced. Sources: S36, S0301, S0302.
Read this exhibit in its chapter ↗10.4
Verified input
Verified input. Starting point. Leads to Join panels. · illustrative
The Lean Enterprise Institute defines a cell through adjacent processing steps and near-continuous movement of items individually or in small batches.
Join panels
Join panels. From Verified input, Qualified relief (Cover). Leads to Finish seams. · illustrative
Finish seams
Finish seams. From Join panels, Qualified relief (Cover). Leads to Accept output. · illustrative
Accept output
Accept output. From Finish seams. End point. · illustrative
Qualified relief
Qualified relief. Starting point. Leads to Join panels (Cover), Finish seams (Cover). · illustrative
Illustrative topology, not a scaled U-shaped floor plan or validated balance. Solid sequence links show proposed material movement; links labelled cover indicate possible assistance by a separately qualified relief role. No simultaneous resource availability is assumed.
Unit: illustrative process and cover relationships. Status: illustrative. Sources: S27, S17. Illustrative figures are teaching examples, not measured factory results.
10.4 · the bodyExhibit 48 above; its figures are illustrative where marked.
The Lean Enterprise Institute defines a cell through adjacent processing steps and near-continuous movement of items individually or in small batches. It explains that a U shape can reduce walking and enable different combinations of operator tasks as demand changes. These are layout mechanisms, not evidence that every U-shaped arrangement improves a garment line.[S27]
GFT recommends starting the layout review with the authorised product family and feasible operation sequence. Mark machine types, attachments, manual work, inspection points and material presentation on the existing floor arrangement. Trace the route of both components and people, including replenishment and removal of rejected work. Record crossings, reaches and returns that require observation. Only then draw alternatives. The proposed test is whether a layout permits the intended work combinations safely and at acceptable quality, with the actual utilities and access conditions present.
An alternative should preserve space for maintenance, cleaning, safe access and material replenishment. GFT recommends checking that compressed air, power leads and other services do not force people across a moving supply route. A short walking path is not sufficient if a worker must twist repeatedly to retrieve panels or cannot adjust the workstation to the task. Obtain competent local safety and ergonomic review before a physical rearrangement. No clearance dimensions are prescribed here because the relevant equipment, building and applicable requirements have not been established.
The illustrative topology in Exhibit 48 shows a proposed sewing path with a qualified relief role. It is deliberately a relationship diagram rather than a scaled floor plan. A U arrangement would place entry and exit near each other, subject to the local access review. The relief links identify where a qualified person might provide cover; they do not establish simultaneous capacity or permit an operator to abandon a running task. Physical placement and staff allocation must still be trialled together.
Before moving equipment permanently, GFT recommends a reversible mock-up using actual material carriers and representative garments. Have operators demonstrate the intended work sequence, replenishment, defect removal and response to a stopped neighbour. Observe the busiest credible staffing configuration as well as the leanest feasible configuration. A cell that works only when everyone is present and no material is delivered has not passed the proposed operating test. Preserve the observations and revise the arrangement before changing fixed services or making a major purchase.
GFT proposes comparing movement as time attached to an actual task sequence. Measure travel with the intended material carrier and the intended replenishment route, then include that time in the assignment under test. An empty-handed walk around an unfinished mock-up is insufficient evidence of the production route. Retain the conditions of the observation, including whether access was clear and whether another operator needed the same space. Where a proposed shared position causes conflicting access, redesign the handover or preserve separate staffing. Do not count the same walking reduction again as both extra production time and a separate reduction in paid hours unless the financial boundary supports both effects.
Layout economics should include the receiving and dispatch boundaries. Bringing machines closer while leaving kits across the building may shorten internal transfers and increase replenishment travel. GFT proposes tracing a complete order through preparation, sewing and removal before crediting a distance saving. Count recurring handling by every affected role, including material handlers and quality staff. Keep aisle stock visible in that trace. This method avoids claiming a local reduction when the same work has simply moved beyond the drawn cell boundary.
The layout decision should remain conditional on product compatibility. A dedicated machine or an operation with a different safety or environmental requirement may need a shared resource outside the cell. GFT recommends describing the external route, its authorisation signal and the permissible queue rather than forcing visual symmetry. The useful cell is the one that supports a feasible sequence with controlled handovers. Its outline can be straight, curved or interrupted if that is what the observed operations require. Appearance is not the acceptance criterion.
10.5
A garment-balancing study explicitly models worker capability by task and compares staff-assignment approaches. Its experiments also show that assigning workers to multiple tasks can worsen the modelled balance when skills differ substantially across those tasks. This is simulation evidence about the studied allocation problem, not proof that cross-training is ineffective. It warns against treating all nominally available workers as interchangeable capacity.[S17]
GFT proposes recording capability at the combination of person, operation, machine, material and quality requirement. Qualification should refer to observed safe execution and accepted work, with an explicit record of any supervision still required. A generic ability to sew does not identify whether somebody can adjust the relevant folder or maintain the required seam on the incoming material. The proposed skills record should therefore support the exact reassignment being considered, while limiting personal information to what the production decision needs.
In an illustrative staffing calculation, assume joining takes 0.8 minutes and seam finishing takes 0.7 minutes for a qualified operator, with 0.2 minutes of movement per completed garment. Combining the tasks gives 0.8 + 0.7 + 0.2 = 1.7 minutes per garment, or about 0.59 garments per minute. If the required cell rhythm is one garment per minute, that combination is infeasible even though the machines are adjacent. These invented values demonstrate why available walking space cannot substitute for a time-feasible assignment.
assume joining takes 0.8 minutes and seam finishing takes 0.7 minutes for a qualified operator
illustrative
If a different illustrative operator needs 1.2 minutes for joining and 0.9 minutes for finishing, the same movement allowance produces 2.3 minutes per garment, or about 0.43 garments per minute. Neither illustrative rate is a measured GFT result or a universal learning allowance. The difference changes the feasible staffing plan before any machine is moved. GFT recommends using task-specific observations and uncertainty ranges in the balancing model, with product and method held comparable, rather than attaching a single permanent speed factor to a person.
If a different illustrative operator needs 1.2 minutes for joining and 0.9 minutes for finishing
illustrative
Training should therefore target a specific coverage gap. GFT recommends identifying an operation whose absence would stop the intended family, selecting a trainee and supervisor, and protecting time for practice outside the promised production rate. Define what evidence authorises independent execution and what causes that authorisation to be reviewed. Include settings, abnormality response and first-piece checks where the assignment requires them. Training is not complete merely because a person has watched the task or has been listed as available on a rota.
The proposed cell trial should test foreseeable disruption without creating unsafe production conditions. Use a planned, supervised absence from the assignment to check whether the nominated cover can take over correctly. Record the time needed for handover and the output or quality effect. Do not deduct that cover role from another operation while still counting its full capacity there. Where no feasible cover exists, retain the staffing constraint in the schedule. A transparent constraint is more useful than a nominally flexible cell that repeatedly breaks its delivery promise.
GFT also recommends including operators in the acceptance discussion. Reassignment can change attention, movement and responsibility even if the total standard work content appears unchanged. Ask whether the task sequence is clear, whether help is accessible and whether the pace can be maintained without bypassing checks. Record concerns as design inputs requiring resolution. The proposed objective is reliable accepted output with feasible work, not a staffing reduction inferred from a drawing. Any employment or remuneration decision requires its own authorised process and applicable advice.
10.6
Exhibit 4910 paragraphs step it
Read-out
All numerical inputs are illustrative: demand 1200 accepted garments, effective rate 2 good garments/minute, processing 600 minutes, lots 600/300/150 and setup counts 2/4/8 including initial setup. Occupied time = 600 + setup count x setup duration. Baseline setup 60 minutes; improved setup 20 minutes; available window 800 minutes. No overlapping setups or additional restart losses assumed. Points compare discrete lot choices, not a fitted continuous curve.
Unit: illustrative occupied minutes per planning window. Status: illustrative. Sources: S25. Illustrative figures are teaching examples, not measured factory results.
The Lean Enterprise Institute describes pull production as upstream work authorised by downstream need. Combined with the SMED distinction, that supplies a practical question: how frequently can the plant change its authorised mix without losing the delivery window? It does not prescribe a universally economic batch size. GFT's proposed comparison keeps production lot size, transfer quantity and customer order size separate, because reducing a transfer bundle need not require an additional style change.[S24][S25]
For the illustrative comparison in Exhibit 49, assume a repeat planning window requires 1,200 accepted garments at a stable effective rate of 2 accepted garments per minute. Processing therefore occupies 600 minutes. Compare production lots of 600, 300 and 150 garments. Assume every lot requires a style setup, including the initial setup within the window, no setup is carried in from a previous period, and all transitions have the same duration. These artificial conditions make the count explicit: the alternatives require 2, 4 and 8 setups.
With an illustrative baseline setup of 60 minutes, total occupied time is 600 + 2 × 60 = 720 minutes for the largest lot, 600 + 4 × 60 = 840 for the middle lot, and 600 + 8 × 60 = 1,080 for the smallest lot. With an illustrative improved setup of 20 minutes, the corresponding totals are 640, 680 and 760 minutes. An assumed available window of 800 minutes admits the smallest lot only under the improved method. This is a conditional feasibility result, not proof of profit.
The illustrative setup shares make the trade-off visible. For lots of 600, 300 and 150 garments, the baseline shares are 120/720, 240/840 and 480/1,080, approximately 16.7, 28.6 and 44.4 per cent. With improved setup they become 40/640, 80/680 and 160/760, approximately 6.3, 11.8 and 21.1 per cent. Smaller lots still carry a higher setup burden. The improvement changes what is feasible; it does not eliminate the penalty. Round only for presentation and retain full precision in the planning calculation.
The illustrative spare-time test in Exhibit 50 reveals a further condition. Under the improved setup, the largest lot leaves 800 - 640 = 160 spare minutes, or 80 additional minutes per setup. The middle lot leaves 120 spare minutes, or 30 per setup. The smallest leaves 40 spare minutes, or only 5 per setup. These are maximum evenly distributed extra allowances in the constructed window, not recommended restart durations. If the smallest-lot option adds more than that allowance on average, it no longer fits without another change to the assumptions.
GFT recommends treating the numerical case as a deliberately simplified screening model. A real transition matrix may depend on colour, attachment, fabric and previous product. Different styles may have different effective rates, and material readiness may force gaps. Recalculate with the actual sequence rather than divide total demand by an average lot size. Preserve the initial and final states so setups do not disappear at the period boundary. Add separate restart loss only where it is not already contained in the effective production rate or measured setup interval.
To test whether a feasible small-lot schedule pays, compare its incremental cost with the avoidable cost or additional contribution it creates. In an illustrative extension, compare the improved lots of 150 and 600 garments. The smaller choice occupies 760 - 640 = 120 extra minutes. Assume an avoidable incremental operating cost of XAF 200 per extra minute, solely as an invented evaluation-date input. The hurdle is 120 × 200 = XAF 24,000 per planning window, before any extra kit preparation, transport, training or defect expense.
If that illustrative smaller-lot choice avoids XAF 30,000 of otherwise expected holding and markdown cost in the same window, the net benefit is XAF 30,000 - XAF 24,000 = XAF 6,000 before the excluded costs. Those assumed values are neither market prices nor a GFT financial forecast. A higher benefit, a lower cost or a different order mix changes the answer. Do not count inventory value released as recurring profit; show cash timing separately. This operating decision framework is not investment, legal or tax advice.
The decision record should end with an owner, a permitted operating range and a review trigger. GFT recommends stating which product families the method covers, which staffing combinations have been demonstrated and which conditions require replanning. Feed those conditions into the line-balancing studio and ramp-planning specification as requirements, not as claimed deployed capability. Leave detailed inventory policy and on-demand manufacturing technology to their respective papers. The specific contribution here is the connection from preparation and physical work design to an economically defensible lot decision.
Check the record
Every knot is a source this chapter cites; select one to read its record, or filter the register by grade. Publication dates and inherited-source limits stay explicit. Read the paper's full evidence summary.
6 sources · 14 citation marks on this pageMost cited: S25, 3 times
Grade AGrade BGrade CKnot size: citations on this page
All 6 records shown
c10-S17 · Grade B
Applying Meta-Heuristics Algorithm to Solve Assembly Line Balancing Problem with Labor Skill Level in Garment Industry
The objective of the proposed model is to minimize the cycle time in the assembly line performed through task placement.
2021-04-26. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗c10-S24 · Grade B
Pull Production
Nothing is produced by the upstream supplier process until the downstream customer process signals a need.
2020-07-02. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗c10-S25 · Grade B
Single Minute Exchange of Die
SMED refers to the target of reducing changeover times to a single digit, or less than 10 minutes.
2020-07-02. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗c10-S26 · Grade B
Standardized Work
They are continuously reviewed and updated as the condition of the worksite changes or improves.
2020-07-02. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗c10-S27 · Grade B
Cell
A U shape (shown below) is common because it minimizes walking distance and allows different combinations of work tasks for operators.
2020-06-12. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗c10-S1001 · Grade B
Applying SMED methodology in cork stoppers production
The amount of production makes the changeover activity a regular process.
2018. Register access date: 2026-10-30. Source provenance is supplied by the paper evidence register.
Open the recorded source ↗S25 Lean Enterprise Institute. 2020-07-02.
S1001 Elsevier, Procedia Manufacturing; author publication hosted by Polytechnic of Porto. 2018.
S26 Lean Enterprise Institute. 2020-07-02.
S27 Lean Enterprise Institute. 2020-06-12.
S17 Atlantis Press, International Journal of Computational Intelligence Systems. 2021-04-26.
S24 Lean Enterprise Institute. 2020-07-02.
Keep the thread · chapter 10 of 14
Move the shuttle along the rack to preview any chapter: its sections, exhibits and reading time. Draft web edition. This research is not investment, legal or tax advice; illustrative models are not measured factory results.
The paper's rack · 14 boltsBolt length: reading time
01Part I: Measure the factory that actually exists
A garment factory creates value when the whole line converts available time and skill into accepted output. Installed machines and busy stations are evidence of resources, not proof of delivery.
02Part I: Measure the factory that actually exists
A single OEE score can start a conversation, but only its components and loss codes can tell a supervisor what to fix.
03Part I: Measure the factory that actually exists
A factory cannot interpret downtime until it has separated legal hours, planned production, external interruptions and losses inside the line.
04Part I: Measure the factory that actually exists
SMV translates garment work content into earned minutes, but it must sit beside OEE and quality rather than replace them.
05Part II: Balance work to the constraint
Balancing begins with operation precedence and required output, then tests how work can be shared without violating machine, skill or quality constraints.
06Part II: Balance work to the constraint
A workstation assignment is feasible only when the operator can perform the method safely and repeatedly at the assumed cycle and quality.
07Part II: Balance work to the constraint
A balance that ignores machine availability, skill or precedence can look efficient on screen and fail on the floor.
08Part II: Balance work to the constraint
A balance calculated for one style and crew decays as absence, learning, defects and order mix change the work.
09Part III: Design flow instead of local busyness
Balanced work needs controlled release. A line shortens delivery time when it admits work that downstream operations can use, makes queues visible and protects good output at its constraint.
10Part III: Design flow instead of local busyness
Small batches become practical when style changes are short, methods are standard and the layout lets qualified operators share work around the constraint.
11Part III: Design flow instead of local busyness
Defects consume capacity twice, first through lost good output and then through rework, queues and repeated interruption.
12Part IV: Turn measurement into sustained performance
A technically balanced line still fails when learned operators are absent, hours are unsustainable or electricity interrupts production.
13Part IV: Turn measurement into sustained performance
The financial benefit is not a higher dashboard score; it is more good garments at acceptable labour, energy, capital and working-capital cost.
14Part IV: Turn measurement into sustained performance
Release the next commitment only when a measured trial shows that good throughput, safe work and controlled flow survive ordinary operating conditions.