About this calculator

Translate measured productive work rates into paid person-hours for a defined batch. Productive share accounts for nonproductive paid time, while separately entered setup is already in paid person-hours.

Inputs

How to use this calculator

Handling task group

  1. Moves or tasks to completeWhole non-negative work units matching the measured productivity.
  2. Moves per productive person-hourMeasured productive-time rate. Do not use a paid-hour rate and then apply the productivity share again.
  3. Total paid setup person-hours for this groupAlready-paid person-hours, added after productive-time conversion; not wall-clock crew time.

Shared inputs

  1. Productive share of paid operating time (%)Greater than 0 through 100. Your observed/assumed share, not a performance standard.
  2. Loaded paid labor cost per hour (USD)Actual entered labor cost.
  3. Paid hours available per worker in the windowTotal paid availability for this work horizon.
  4. Available workersWhole non-negative count; used only to report a person-hour shortfall.

Enter the shipment or scenario values, then select Calculate result.

Method

Formula and variables

Productive person-hours = sum(moves ÷ measured productive moves/hour). Paid hours = productive hours ÷ productive share + entered paid setup hours. Cost = paid hours × loaded rate. Staffing lower bound = ceil(paid hours ÷ paid hours available per worker). Shortfall = max(0, paid hours − entered workers × worker availability).

Moves or tasks to complete
Whole non-negative work units matching the measured productivity.
Moves per productive person-hour
Measured productive-time rate. Do not use a paid-hour rate and then apply the productivity share again.
Total paid setup person-hours for this group
Already-paid person-hours, added after productive-time conversion; not wall-clock crew time.
Productive share of paid operating time (%)
Greater than 0 through 100. Your observed/assumed share, not a performance standard.
Loaded paid labor cost per hour (USD)
Actual entered labor cost.
Paid hours available per worker in the window
Total paid availability for this work horizon.
Available workers
Whole non-negative count; used only to report a person-hour shortfall.

Interpret the result

Required workers are an aggregate hours-based lower bound. The number does not prove tasks can be scheduled with the needed skills, equipment or safe operating conditions.

Outputs: Paid hours, labor cost and staffing lower bound

An aggregate person-hour estimate, not a task schedule or safe productivity target. No travel congestion, precedence, skill mix, queueing, fatigue, labor law or staffing feasibility is inferred. Active setup is already in paid hours and is not divided by the productive share again.

Worked example

Check the arithmetic

This example uses the starting values shown above. The arithmetic below is calculated independently of the interactive result.

Work through the calculation

  1. Productive hours = 1,000 moves ÷ 25 moves/person-hour = 40 hours.
  2. Paid hours = 40 ÷ 0.80 + 1 setup hour = 51 hours; cost = 51 × $30 = $1,530.
  3. Workers = ceil(51 ÷ 8) = 7. Six workers supply 48 hours, leaving 3 person-hours short.

Compare the displayed result

Expected displayed result: 51 paid hours

FAQs

Should setup hours be divided by productive share?

Not in this model. Setup is already entered as paid person-hours and is added after converting productive operating hours to paid hours.

Example inputs and options

Starting values are examples unless a field identifies a dated rule. Unit selectors convert only fields marked for conversion. Rates and model options keep the units and basis shown in their labels.

Moves or tasks to complete
Example: 1000
Moves per productive person-hour
Example: 25
Total paid setup person-hours for this group
Example: 1
Productive share of paid operating time (%)
Example: 80
Loaded paid labor cost per hour (USD)
Example: 30
Paid hours available per worker in the window
Example: 8
Available workers
Example: 6