Measuring staff time saved by an in-store system

Measure the full staff task before and after deployment, exceptions and new system work included. Report minutes per eligible task separately from total hours for a defined workload. A faster screen step is not necessarily staff time saved.

Set the task boundary

Write down what starts and ends the task. Use the same boundary for the old and new workflow.

For a stock enquiry, the clock might start when a shopper asks and stop when staff give a usable answer or record that they cannot. Include walking to the stockroom, asking a colleague, correcting a record and returning to the shopper.

Define eligible cases before timing them. Include unsuccessful enquiries and cases handed to another person; otherwise the new system can look quicker merely because difficult work disappears from the timed sample.

Record whether staff worked alone or in parallel. If two colleagues each spend three minutes on one request, that is six staff-minutes, even if the shopper waits only three minutes.

Observe comparable work

Sample shifts when the task normally occurs, including a busy period and a relevant exception. Record the date, store, task type, outcome, staff-minutes, number of staff involved and any interruption. After deployment, note the system version, training stage and whether staff used the intended workflow or a workaround.

Use the same observation rule and case categories in both periods. Check the mix of simple and difficult cases. A period with mostly routine lookups should not be compared without qualification with one dominated by missing stock. If task volume changes, show it rather than hiding it inside an average.

Use the same chosen case count when comparing estimated old and new workload hours. Show the actual counts too. If case mix differs, calculate by case type where the sample permits; otherwise mark the estimate as rough.

Add work outside the timed cases

Count continuing tasks the new process requires outside those cases: account administration, charging or checking devices, data maintenance and reviewing exceptions. Separate one-off installation and training effort from continuing work. A supervisor's time reviewing exceptions is still staff effort even if the sales colleague spends less time on the enquiry.

Subtract only work that was not already included in the timed cases from the estimated task-time reduction. State the period and assumptions. If a task is done during otherwise idle moments, fewer staff-minutes may improve capacity without changing a roster. Converting capacity into a cash saving requires separate evidence about paid hours and the retailer's staffing decision.

Investigate the cases behind the figure

Review the slowest, failed and manually corrected cases. Ask whether the system removed work, shifted it to another team or made previously hidden work visible. Check whether customer answers remained dependable. Record what changed outside the system, such as staffing, stock location or training.

Present the observation windows, case counts, definitions, staff-minutes, new recurring work and unresolved cases together. Call the result an observed change under those conditions. A before-and-after time difference by itself does not prove the technology caused all of it.

Pros and Cons of Using a New In-Store System for Time Tracking