Conveyors worked example

Accumulation Capacity at 99% accumulation zone uptime: a worked example

Push accumulation zone uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. a material-flow engineer needs to know whether a buffer can absorb expected downstream interruptions

The inputs for this scenario

  • Usable accumulation positions: 180 part positions (unchanged)
  • Planned buffer turns per shift: 3 turns / shift (unchanged)
  • Accumulation zone uptime: 99 % (raised for this scenario; the documented default is 94)
  • Good release yield: 99 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross buffer capacity = usable accumulation positions × planned buffer turns) to the inputs above produces each figure below.
  • At this operating point the engine returns 529 parts for usable accumulation capacity, the number this scenario is built around.
  • At this operating point the engine returns 540 parts for gross buffer positions handled.
  • At this operating point the engine returns 5.4 parts for positions lost to downtime.
  • At this operating point the engine returns 5.35 parts for positions lost to release rejects.

How this compares with the baseline

  • Against the tool's baseline example, where accumulation zone uptime sits at 94% and the headline result is 503 parts, this scenario comes in 5.32% above the baseline at 529 parts.
  • It computes the usable accumulation capacity in parts per shift by multiplying buffer positions by planned turns, then derating for zone uptime and good release yield. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Usable accumulation capacity: 529 parts (headline result)
  • Gross buffer positions handled: 540 parts
  • Positions lost to downtime: 5.4 parts
  • Positions lost to release rejects: 5.35 parts

Run it with your numbers

  • Every input above is editable in the live Accumulation Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.