Guide / measurement
Inventory system KPIs — the ones worth tracking
Five measures computable from your own records, the cadence that makes them useful, and a standing refusal to quote industry benchmarks — your trend is the only comparison that matters.
The key facts
- Five KPIs earn their keep: inventory accuracy, fill rate, stock turnover, adjustment frequency, order cycle time — all computable from a movement record.
- The cadence matters more than the dashboard: monthly trend beats real-time theatre; each KPI needs an owner and a review.
- No invented benchmarks on this page — every number worth comparing is your own last quarter.
- BSimple's position: the KPIs are computable from its movement record (reporting views, dashboard) — from $180/month AUD, trial free.
- Context: the full inventory system holds the wider system, this page one stop in it.
- 01The key facts
- 02The five KPIs, with formulas
- 03The cadence that makes KPIs useful
- 04Where BSimple sits
The five KPIs, with formulas
Inventory accuracy = lines counted matching the record ÷ lines counted, per cycle count. The foundation: if this is wrong, every other number is theatre. Track monthly; investigate every variance with a reason — the reasons are where the processes confess.
Fill rate = lines shipped complete as ordered ÷ lines ordered. The promise-keeping measure — it prices every stockout that happened before it became visible.
Stock turnover = cost of goods sold ÷ average inventory value. Not universally higher-is-better — it prices the trade between stockouts and capital buried on shelves, and it is where slow movers get named. The overstock cost is the quiet one.
Adjustment frequency = correction movements per week, with reasons. The early-warning system: rising adjustments mean a process — receiving, picking, counting — is drifting before customers notice.
Order cycle time = placement to dispatch, measured per stage. Stage timing locates bottlenecks precisely: "orders sit two days between entry and pick" beats "the warehouse feels slow" every time. The life-cycle stages are the measurement points.
The cadence that makes KPIs useful
KPIs die by dashboard — watched once, admired, abandoned. Three habits keep them alive: an owner (one named person per measure), a cadence (monthly for all five; cycle time weekly if orders are daily), and a decision attached (each review ends with one change or one explicit "no change"). The measures that matter are the ones someone acts on; the rest is wallpaper.
What a system contributes is making the measurement free: accuracy from cycle counts already in the record, fill rate and cycle time from order states, adjustments as recorded movements with reasons and authors. If producing your KPIs requires an export ritual, the ritual is the reason they stop. The tools-and-techniques companion covers the conflict-handling side.
Where BSimple sits
We build BSimple, so weigh that. Its design makes the five KPIs computable rather than claimed: an append-only movement history behind every quantity (accuracy and adjustments), order states through pick, pack and invoice (fill rate, cycle time), stock values on the dashboard (turnover). GST-inc/ex-GST reconciliation and the Xero/MYOB handoff (US integrations rolling out) keep the money-side measures honest too. Plans run $180/$250/$399 per month AUD; the trial computes your baseline on your own products — which is the only benchmark this page will endorse.
Frequently Asked Questions
What KPIs should an inventory system track?
At minimum: accuracy, fill rate, turnover, adjustment frequency and cycle time — each computable from the movement record, each owned by a named person, each reviewed monthly with a decision attached. More is wallpaper.
What is a good inventory accuracy rate?
We will not quote a percentage — invented benchmarks are this market's habit. The useful target is a trend: your accuracy this quarter versus last, with every variance investigated. High and rising beats a magic number you cannot sustain.
How is stock turnover supposed to be interpreted?
As a trade, not a score: higher turnover means less capital buried in stock but less buffer against supply hiccups. Read it alongside fill rate — high turnover with falling fill rate means the trade has tipped too far.
Which KPI reveals problems earliest?
Adjustment frequency — corrections rise weeks before stockouts or failed counts surface them. It is the check-engine light of the record, and it only works when adjustments carry reasons and authors.
How do we start measuring without a project?
Run one cycle count and compute accuracy; time five orders through each stage. The trial produces both on your products in an afternoon — the baseline is free, and it is the number every later improvement is measured against.
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