The final lesson states the boundary: this is deterministic labor ratio arithmetic.

highlighted = computed this step

Deterministic ratios

The calculations use fixed output, actual hours, and standard rate inputs.

deterministic labor ratio arithmetic\text{deterministic labor ratio arithmetic}
What-if and scopeThe chart compares actual hours, standard hours, and the what-if actual hours.what-if and scopeproductivity 4; efficiency 4/5actual hoursactual hours 24standard hoursstandard hours 96/5what-if hourswhat-if hours 20measurevalueformulaoutput96givenlabor hours24givenproductivity4output / hoursstandard hours96/5output / rateefficiency4/5standard / actualwhat-if efficiency24/25standard / what-ifdeterministic labor ratio arithmetic only

Not staffing

This does not create a staffing plan or model fatigue and learning curves.

outside scope: staffing, fatigue, learning curves\text{outside scope: staffing, fatigue, learning curves}
What-if and scopeThe chart compares actual hours, standard hours, and the what-if actual hours.what-if and scopeproductivity 4; efficiency 4/5actual hoursactual hours 24standard hoursstandard hours 96/5what-if hourswhat-if hours 20measurevalueformulaoutput96givenlabor hours24givenproductivity4output / hoursstandard hours96/5output / rateefficiency4/5standard / actualwhat-if efficiency24/25standard / what-ifdeterministic labor ratio arithmetic only

Not validity proof

This does not prove standard validity, quality, or causal improvement.

outside scope: standard validity, quality, causality\text{outside scope: standard validity, quality, causality}
What-if and scopeThe chart compares actual hours, standard hours, and the what-if actual hours.what-if and scopeproductivity 4; efficiency 4/5actual hoursactual hours 24standard hoursstandard hours 96/5what-if hourswhat-if hours 20measurevalueformulaoutput96givenlabor hours24givenproductivity4output / hoursstandard hours96/5output / rateefficiency4/5standard / actualwhat-if efficiency24/25standard / what-ifdeterministic labor ratio arithmetic only

Honesty note

This is deterministic labor ratio arithmetic only. It does not create a staffing plan, model fatigue, include learning curves, prove standard validity, measure quality, or prove causality.

deterministic labor ratio arithmetic only\text{deterministic labor ratio arithmetic only}
What-if and scopeThe chart compares actual hours, standard hours, and the what-if actual hours.what-if and scopeproductivity 4; efficiency 4/5actual hoursactual hours 24standard hoursstandard hours 96/5what-if hourswhat-if hours 20measurevalueformulaoutput96givenlabor hours24givenproductivity4output / hoursstandard hours96/5output / rateefficiency4/5standard / actualwhat-if efficiency24/25standard / what-ifdeterministic labor ratio arithmetic only