Cycle Time & Waste Analysis Tool

Time observation, VA/NVA split and TIMWOODS waste breakdown

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What do VA/NVA and TIMWOODS mean?

Value-Added vs Non-Value-Added

  • VA — the customer would pay for this step if they could see it happening (fitting a part, assembling a component).
  • NVA — the process needs it right now, but the customer gets no value from it (walking, waiting, rework). Tag every NVA step with a waste type below.

The 8 Wastes — TIMWOODS

  • Transport — unnecessary movement of material or product
  • Inventory — more stock or WIP than needed right now
  • Motion — unnecessary movement by people
  • Waiting — idle time for material, info or a machine
  • Over-production — making more/sooner than needed
  • Over-processing — doing more than the spec requires
  • Defects — errors, rework or scrap
  • Skills — not using people's knowledge or ideas

How to run the study

  • Fill in shift length, breaks and demand to get a takt time
  • List each step in order, timing 3–5 repeat cycles per step
  • Mark VA/NVA, tag the waste type on NVA steps
  • Use the waste breakdown to prioritise what to fix first

Study Setup

Total Cycle Time
0.0s
Value-Added %
0.0%
0.0s VA / 0.0s NVA
Takt Time
0.0s
per unit, from demand
vs Takt
-

Time Observation

# Process Step C1 (s) C2 (s) C3 (s) C4 (s) C5 (s) Avg (s) VA/NVA Waste Type Notes / Action

Waste Breakdown (TIMWOODS)

Waste profile — % of total cycle time per category