Shopfloor

Manufacturing

General manufacturing operations, methods, and industry developments.

Flow. Inspect. Improve.

Learning paths & worksheets: Downtime log template · SMED changeover observation template · Industrial automation fundamentals · Manufacturing performance: pace, losses and quality

Tools

Terms in this topic

Andon system
Visual signal for production status and immediate help.
Bottleneck
The operation or shared resource that limits effective throughput under the actual production conditions.
Brownfield
Existing plant or system that new tech must integrate with.
Changeover
Switching a line or machine from one product to another.
Contribution per unit
Selling price less the avoidable variable costs attributed to one additional good unit.
Control limits
Statistical boundaries calculated for a control chart under its chosen sampling model.
Cycle time
Elapsed time to complete one repeatable production cycle.
Discrete manufacturing
Manufacturing distinct items on lines and cells.
External setup
Changeover preparation that can be performed while the previous production job is running.
Failure Modes and Effects Analysis (FMEA)
Structured analysis of failure modes, effects, and risk controls.
First-pass yield (FPY)
Share of units accepted without rework or retest.
Gemba
The real place (shop floor).
Hazardous area classification
Zoning for explosive atmospheres.
Internal setup
Changeover work that requires the equipment to be stopped.
IP rating
Enclosure ingress protection code.
Kaizen
Continuous incremental improvement.
Kanban
Pull-based replenishment signal.
Lead time
Elapsed time from a specified start event to a specified completion event.
Lockout/tagout (LOTO)
Energy-isolation procedure for safe equipment servicing.
Motor Control Center (MCC)
Centralized motor starter lineup.
NEMA rating
North American enclosure standard.
Nonconformance
Documented failure to meet a specified requirement.
Pareto chart
A ranked view of categories by a chosen measure, often with cumulative share.
Permit to work
Formal authorization and controls for hazardous work.
Planned production time
The time included in a defined production plan after explicitly agreed exclusions.
Poka-yoke
Error-proofing by design.
Process capability
Comparison of process spread and centering against engineering specification limits.
Rational subgroup
A sampling group designed so within-group variation represents the short-term variation being studied.
Rework
Additional processing of a unit to bring it into the required condition after an initial failure.
Rolled throughput yield
The product of consistent conditional first-pass yields along a defined process route.
Root-cause analysis (RCA)
Evidence-based investigation of why a problem recurred.
Sample standard deviation
A measure of observed spread using squared deviations from the sample mean and an n−1 denominator.
Simple payback
Installed investment divided by positive annual net benefit in an undiscounted constant-benefit model.
Six big losses
OEE loss categories.
SMED
Single-minute die exchange.
Specification limits
Engineering or customer acceptance boundaries for a product characteristic.
Statistical process control (SPC)
Statistical monitoring of process variation and stability.
Takt time
Required production rhythm set by available time and demand.
Throughput
Good output crossing a defined process boundary per unit of time.
Total productive maintenance (TPM)
Operator-involved maintenance system focused on eliminating losses.
Work in process (WIP)
Material currently moving through production but not yet finished.

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