Construction labour productivity log calculator

Calculate observed productivity by stated unit/hour and total recorded person-hours with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use observed productivity by stated unit/hour and total recorded person-hours to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

JSON Work types [ID,completed quantity in stated unit,total person-hours]
[["brick m²",80,40],["paint m²",200,25]]
Observed productivity by stated unit/hour
[["brick m²",2],["paint m²",8]]
Total recorded person-hours
65

Try another scenario

JSON Work types [ID,completed quantity in stated unit,total person-hours]
[["brick m²",100,40],["paint m²",200,30]]
Observed productivity by stated unit/hour
[["brick m²",2.5],["paint m²",6.66666666667]]
Total recorded person-hours
70
Calculation method

Calculation method

Observed productivity by stated unit/hour

J([[r[0],r[1]/r[2]] for r in a])

Total recorded person-hours

sum(r[2] for r in a)

Symbols and units
a
JSON Work types [ID,completed quantity in stated unit,total person-hours]

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Calculation steps and notation

sum(list) adds all entries in the list.

Assumptions & limits

Assumptions & limits

  • Descriptive measured productivity only; positive labour hours. Different physical work quantities are never summed. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
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