Work in progress in fashion production

What is Work in progress in fashion production?

Work in progress (WIP) refers to work located between processing steps. The concept is useful when product development, samples and manufacturing must be read as distinct states rather than as one undifferentiated queue. In a garment-production flow, the record should answer: what is the object, which stage is it in, who can act, and what condition allows it to move forward?

The Lean Enterprise Institute definition is deliberately narrow: items sit between processing steps; in a lean system, standardized WIP is the minimum needed for a cell or process to keep flowing. This is not a universal inventory target. It is a way to distinguish work actually in process from accumulation, waiting or rework.

How does WIP appear in samples?

Sample stages give operational names to different states. A proto sample is the first sample derived from a design concept. A fit sample checks fit on a dress form or human model and verifies specification measurements. A size-set sample tests multiple sizes and pattern grading. These states should not be treated as synonyms: each answers a different development question.

The PP sample occupies another point in the flow. It is made with actual fabric and may be prepared on the production line according to the buyer’s instruction. The buyer then checks detailing and workmanship; the result may be approval, resubmission or authorization with comments. In pilotage, those comments need to become an identifiable action rather than a loose message. A status such as “PP pending” is incomplete without the sample version, owner and decision criterion.

How can WIP be controlled without confusing stages?

Start with a stable unit: style, color, size, sample or lot. Then use mutually intelligible states such as “in development,” “awaiting fit,” “awaiting approval” and “in manufacturing.” This naming is an organizational recommendation; it does not replace the criterion defined for each process.

For each change, record the event and the affected object. The traceability model described by GS1’s EPCIS uses visibility data formed by events about real-world occurrences involving objects. That structure can record what changed without turning a status board into proof of quality. Quality control remains a decision with its own method and criterion.

The reading must also distinguish work in process from waiting, reserved material and rework. A card may remain visible in the flow while being stopped by missing measurements, fabric, approval or capacity. The indicator should therefore show stage and blockage, not only an aggregate count.

Why is this scope useful across the fashion chain?

Work in progress connects tech pack, prototyping, fit approval, pilotage and traceability without claiming that these practices are equivalent. It provides a language for deciding where a garment, sample or lot is and what evidence is missing before the next passage.

The value lies in state precision. “In progress” may mean design, patternmaking, cutting, sewing, fitting, approval or production; each reading calls for a different action. A clearly bounded WIP makes process limits explicit and prevents sample approval from being confused with confirmation of an entire production run.