Staffing Sensitivity Model

Turn operational assumptions into a clear staffing estimate. Adjust volume, handling time, and utilisation to see how required headcount changes.

← Back to Toolbox

Outputs are estimates based on your inputs. This tool does not optimise or recommend actions.

Assumptions

These inputs define the scenario you want to model.

Weekly volume (units)

Total units processed per week (e.g. calls, tickets, tasks).

Average handling time (minutes)

Average time per unit in minutes.

Hours per FTE per week

Contracted working hours per week per person (before utilisation).

Utilisation (%)

Percent of paid time available for handling work (after meetings, admin, breaks, etc.).

Current headcount (FTE)

Your current staffed capacity in FTE terms (e.g. 7.5 for part-time mix).

Fully-loaded cost per FTE (annual)

Salary + on-costs + overheads, expressed as an annual figure per FTE.

Sensitivity range (±%)

Used for the sensitivity table (below).

Outputs

Derived from assumptions. Updates instantly.

Workload (hours / week)

—

Effective capacity per FTE (hours / week)

—

Required headcount (FTE)

—

Capacity gap vs current (FTE)

—

Estimated annual cost (current)

—

Estimated annual cost (required)

—

Cost delta (required - current)

—

Throughput per FTE (units / week)

—

Sensitivity (volume)

How required headcount changes if volume moves within your selected range.

Volume change	Weekly volume	Required FTE	Gap vs current

Notes: “Utilisation” reduces paid hours to effective handling time. “Fully-loaded cost” is a modelling assumption and should be consistent across scenarios.