OPEX THE AUK WAY • 5S – Page 2

Definition

A workplace organization and visual management system, originating from lean manufacturing.

Based on five structured steps: Sort, Set in Order, Shine, Standardize, and Sustain.

Goal: Improve efficiency, safety, quality, and employee ownership of the work environment.

The Five Steps

1️⃣ Sort (Seiri – Sortation)

Identify and remove unnecessary items from the workplace.
Use red tagging: items deemed unnecessary are tagged with details (who, why, category).
Items remain visible for approx. one week for review before disposal.
Recommended timeframe: ~3 weeks to complete sortation.
Creates space, reduces clutter, and eliminates hidden waste.

2️⃣ Set in Order (Seiton)

Principle: “A place for everything and everything in its place.”
Frequently used items stored near point of use.
Group related items, label clearly, and apply logical storage rules.
Use visual management: floor markings, tool shadow boards, color codes.
Improves accessibility, safety, and time efficiency.

3️⃣ Shine (Seiso)

More than cleaning – focuses on inspection through cleaning.
Detects potential issues early (leaks, wear, damage).
Requires daily housekeeping schedules, clear responsibilities, and teamwork.
Builds pride in the workplace and ensures equipment reliability.

4️⃣ Standardize (Seiketsu)

Establishes routine workflows and simple written standards.
Ensures consistent practices across teams and shifts.
Encourages staff rotation by making processes transparent.
Reinforces 5S habits through coaching, training, and consistency.
Makes 5S “the new normal” and visible to both employees and customers.

5️⃣ Sustain (Shitsuke)

The most challenging step: embedding 5S into culture.
Relies on discipline, repetition, and leadership commitment.
Tools: confirmation orders, 5S walks, visual management boards, training, audits.
Prevents teams from reverting to old habits.
Success depends on long-term reinforcement and organizational ownership.

Implementation Approach

Training & Awareness: build understanding before action.
Gemba Walks: observe the actual workplace to assess current state.
Audits: provide objective data, highlight issues, and monitor progress.
Continuous Improvement: avoid treating 5S as a one-time event.

Common Pitfalls

Treating 5S as a short-term project rather than a long-term cultural shift.
Lack of leadership support and role modeling.
Missing follow-up processes or structured audits.
Weak application of the Sustain phase.

Core Insight

5S is more than a cleaning exercise – it is a structured system for efficiency, discipline, and culture. When properly sustained, it becomes a foundation for lean transformation and continuous improvement.

Review Questions (Self-Check)

What is the purpose of the red-tagging process during Sortation?
How does Set in Order improve workplace efficiency and safety?
Why is Shine considered more than just cleaning?
In what way does Standardization make 5S “the new normal”?
Why is Sustain often the most difficult step, and what tools support it?
Which common pitfalls can lead to 5S failure in organizations?

Glossary of Terms & Abbreviations

Lean & Flow Fundamentals

Cell / U-Cell — Compact, process-oriented layout (often U-shaped) enabling one-piece flow, visual control, and multi-skilled operation.
One-Piece Flow — Movement of units one at a time (or one small lot) through consecutive steps with minimal buffers.
Takt Time (TT) — Available production time per period ÷ customer demand; the pace at which the cell must produce.
Cycle Time (CT) — Time to complete one unit or cycle at a workstation/process.
Lead Time (LT) — Elapsed time from order to delivery; includes processing and waiting.
Work in Process (WIP) — Inventory between start and finish of a value stream.
Bottleneck / Constraint — Process with the least capacity that limits overall throughput.
Value Stream Mapping (VSM) — End-to-end visualization of material and information flow to identify waste.
Yamazumi (Balance Chart) — Stacked bar chart used to balance workload across operators or steps.
Heijunka (Leveling) — Smoothing of volume and mix to stabilize flow and resources.
Pitch — Fixed time interval that links planning to the shop floor (often TT × pack size).
Gemba — “The real place” where value is created; go-and-see management practice.

Methods, Systems & Visual Control

SMED (Single-Minute Exchange of Dies) — Reducing changeovers by shifting internal to external tasks and simplifying setup.
Kanban — Pull signal (card/bin/electronic) to replenish only what is consumed.
Supermarket — Controlled buffer with set min/max to decouple processes.
FIFO Lane — First-in-first-out queue to preserve sequence and lead-time predictability.
Andon — Visual/audible alert for status and abnormalities; empowers stop-to-fix.
Poka-Yoke — Error-proofing devices or methods preventing defects at the source.
Jidoka — Built-in quality and autonomous stop upon abnormality.
Standard Work (SW) — Best-known method combining standard sequence, time, and WIP for stability.
Skill Matrix — Visual grid of operator capabilities vs. tasks to plan cross-training and coverage.
PFEP (Plan for Every Part) — Structured data set for each item: supplier, pack, storage, delivery, usage.

Quality & Industrial Engineering

FPY (First-Pass Yield) — % of units passing a process without rework.
OEE (Overall Equipment Effectiveness) — Availability × Performance × Quality.
CTQ (Critical to Quality) — Product/process attributes vital to the customer (e.g., shade, tensile).
SPC (Statistical Process Control) — Control charts to monitor stability and variation.
Cp / Cpk — Process capability indices vs. specification limits (centering accounted in Cpk).
FMEA / RPN — Failure Mode & Effects Analysis; Risk Priority Number ranks failure risk.
MSA (Measurement System Analysis) — Studies (e.g., Gage R&R) to validate measurement reliability.
SOP (Standard Operating Procedure) — Controlled instruction document for consistent execution.
PPAP (Production Part Approval Process) — Formal approval package for customer/launch readiness (if required by sector).

Planning, Logistics & Business KPIs

MRP / ERP — Material Requirements Planning; Enterprise Resource Planning systems for planning/integration.
MES — Manufacturing Execution System (dispatching, tracking, parameters, traceability).
BOM — Bill of Materials; structured list of components/consumables (e.g., yarn, dyestuff, lubricant).
SKU — Stock Keeping Unit; unique item code.
MOQ — Minimum Order Quantity set by supplier or economics.
VMI — Vendor Managed Inventory; supplier monitors and replenishes stock.
OTIF (On-Time In-Full) — Delivery reliability metric.
EPEI (Every Part Every Interval) — Time to cycle through the full product family at leveled conditions.
COGS / CoO — Cost of Goods Sold / Cost of Ownership; key financial metrics for decisions.
Postponement — Delaying final differentiation (e.g., dyeing/color) to reduce inventory and improve responsiveness.

Sewing Thread – Process & Product Terms

Winding — Forming yarn packages (cones/bobbins) suitable for downstream processes.
Twisting — Combining filaments/plies to achieve target structure, strength, and handle.
Heat-Setting — Thermal stabilization to lock twist and dimensional stability.
Dyeing — Applying dyestuffs to achieve target shade; batch or continuous methods.
Lubrication / Finishing — Applying finishes (e.g., silicone, wax) to control friction, heat, and sewability.
Spooling / Rewinding — Transferring thread onto final delivery package (e.g., king spool, cone) to spec.
Shade — Perceived color of dyed thread vs. standard.
ΔE (Delta E) — Numeric color difference vs. standard (instrumental colorimetry).
Package Density — Mass per unit volume on the package; impacts dye penetration and drying.
Lot / Dye Lot — Traceable batch with homogeneous parameters and history.
Tex / dtex / Denier — Linear density units (Tex=g/1000 m; dtex=g/10,000 m; Denier=g/9000 m).
Count (Ne / Nm) — Cotton metric (Ne) or metric count (Nm) indicating fineness in indirect systems.
TPI / TPM (Twist per Inch / Meter) — Twist level applied to the yarn/thread.
Tenacity / Tensile Strength — Load at break normalized by linear density / absolute; key performance measure.
Elongation at Break — % extension at failure; critical for seam performance.
Coefficient of Friction (CoF) — Sliding resistance; strong driver of needle heat and sewability.
Lube Pickup (%) — Mass of finish taken up by the thread; affects CoF and handling.
Hairiness — Surface fibers protrusion; impacts appearance, friction, and linting.
Moisture Regain — % moisture absorbed under standard conditions; affects weight and dyeing.
Core-Spun — Filament core (e.g., polyester) wrapped by staple fibers (e.g., cotton) for strength/handle.
Ply — Number of combined ends (e.g., 2-ply, 3-ply).
Package Types — Cones, tubes, king spools, cops; defined by geometry and capacity.

Compliance, Safety & Sustainability

REACH / RoHS — EU regulations controlling chemicals and hazardous substances.
ZDHC — Zero Discharge of Hazardous Chemicals program/guidelines.
MSDS / SDS — (Material) Safety Data Sheet for chemicals used in production.
Higg Index — Tools to measure sustainability performance (facilities/materials).
EHS — Environment, Health & Safety; regulatory and internal standards.
Traceability — Ability to track materials, parameters, and lots through the value stream.

Cross-Site & Global Operations

Master Recipe / Golden Batch — Harmonized, validated process parameters used as cross-plant standard.
Process Window — Approved parameter ranges guaranteeing capability (e.g., temp, time, tension).
Tech Transfer — Structured replication of a process/cell to another site (documents, training, run-at-rate).
Run at Rate (R@R) — Verified production at the required volume and quality before release.
Obeya — Large visual management room for cross-functional coordination and problem-solving.
A3 — Structured problem-solving/reporting method on a single A3 page.

OPEX THE AUK WAY • 5S