Work out standard time with allowances instantly with clear inputs, formula shown and shareable results.
Time study converts an observed time into a standard: normal time is observed time x performance rating, which corrects for the operator working faster or slower than standard pace, and standard time adds allowances for personal needs, fatigue and unavoidable delay. Standard output follows from available minutes divided by standard time.
Standard time
Normal time = observed time x performance rating; standard time = normal time x (1 + allowance %)
Against a defined benchmark pace, usually dealing playing cards or walking at 4.8 km/h as 100%. Rating is the most subjective part of time study and needs trained, regularly cross-checked observers.
9-15% for light bench work in good conditions, up to 25-30% for heavy work in heat or awkward postures. Allowances should be derived from a published table, not invented.