Time and motion study
Definition
Time and motion study
A time and motion study breaks a task into its steps, times each one under normal conditions, and uses the result to set a realistic work standard. It turns a vague job into a measured sequence, which is what makes staffing and pricing defensible.
The method combines two older traditions: Frederick Taylor’s stop-watch timing and the Gilbreths’ study of motion. One asks how long a step takes, the other asks whether the step should exist.
In outsourcing, the study sits underneath the headcount quote — you cannot price a transaction-based contract honestly without knowing how long one transaction really takes.
Done well, it also exposes waste nobody had noticed — the second system login, the manual copy-paste, the approval that waits a day for a signature.
Key takeaways
- The study times each element of a task, then adds allowances to produce a standard time.
- Observation covers a trained worker at a sustainable pace, not the fastest person on the floor.
- Outputs feed staffing models, transaction pricing and process redesign.
- Standards set from unrealistic pace create ergonomic and industrial relations risk.
How it works
A time and motion study works in five steps: break the task into elements, observe and time each element repeatedly, rate the pace observed, add allowances for rest and delay, then publish the standard time per unit.
Element breakdown comes first. A claims-processing task might split into retrieve, verify, key, check and close, with each element timed separately so you can see which one actually carries the cost.
Repetition matters more than precision. Twenty observations across different operators and different times of day give a far more honest picture than one perfect stopwatch run.
Allowances are where studies are won or lost. Add personal time, fatigue and unavoidable delay — or you publish a standard nobody can hold for a full shift.
Pace rating is the subjective step everyone forgets. The observer judges whether the person being timed is working at normal effort, and a rating set 10% high bakes an unreachable standard into every quote.
Rate against a defined benchmark, and record who did the rating.
| Step | What it produces | Common error |
|---|---|---|
| Element breakdown | A list of timed sub-tasks | Elements too broad to act on |
| Observation | Repeated raw timings | Watching one star performer |
| Pace rating | Normalised time at standard effort | Rating inflated by observer bias |
| Allowances | Rest, fatigue and delay factor | Allowances omitted entirely |
| Standard time | Minutes per unit of output | Treated as a quota, not a baseline |
Output feeds straight into efficiency metrics and into the labor cost model behind a quote. A process improvement analyst usually owns the study and the redesign that follows.
Examples
The method has a documented history and a very current application. Taylor’s original steel-works studies, modern offshore transaction pricing, and the safety record of pace-driven work all show what the technique does well and badly.
The origin is well recorded. In The Principles of Scientific Management, published in 1911, Frederick Winslow Taylor describes using stop-watch observation to raise pig-iron handling at Bethlehem Steel from about 12.5 tons a day to 47.5 tons.
That example also carries the warning. The gains were real, the methods were coercive, and the backlash shaped a century of labour relations and the rise of the labor union response to measured work.
Frank and Lillian Gilbreth took the other half of the problem. They filmed work to strip out wasted movement, asking not how fast a step could be done but whether the step needed doing at all.
Offshore delivery uses a gentler version daily. Before quoting a back-office contract, providers in Manila or Kraków time a sample of transactions to set the per-unit standard the labor cost ratio depends on.
The safety caveat is documented too. The National Institute for Occupational Safety and Health notes that musculoskeletal disorders are caused by sustained force, vibration, repetitive motion or awkward postures, all of which a tight standard can intensify.
Used as a baseline, the study improves a process. Used as a quota, it produces injury claims, attrition — and a quality problem that outlives whatever labor arbitrage saving prompted it.
Related terms
Time and motion study sits among several measurement and labour terms. Keeping them separate matters, because a standard time, a cost ratio and a productivity rate answer different questions for different audiences.
- Efficiency metrics: the ratios a standard time feeds, such as output per hour worked.
- Labor cost ratio: labour cost as a share of revenue or total operating cost.
- Process improvement analyst: the role that runs the study and redesigns the work.
- Labor arbitrage: the wage differential that makes offshore delivery cheaper.
- Labor only contracting: a prohibited arrangement in Philippine law where a contractor supplies workers without substantial capital.
FAQ
Five questions follow most time and motion studies: how many observations are needed, what allowance to apply, whether the method still fits knowledge work, how it differs from work sampling, and who should run it.
How many observations do you need?
Enough for the spread to settle, which usually means twenty or more cycles across several operators and shifts. Fewer than ten tells you about one person on one day.
Record the spread as well as the average, because a wide spread means the elements are badly defined.
What allowance percentage is standard?
There is no single figure, and it varies by physical demand and working conditions. Derive it from observed rest and delay in your own operation rather than importing a textbook number.
Does it still work for knowledge work?
Partly. It measures repeatable, bounded tasks such as claims keying or order entry well, and measures judgement-heavy work badly. For the latter, sample activity rather than time individual steps.
How is it different from work sampling?
A time and motion study times a task continuously; work sampling takes random observations and infers how time is distributed. Sampling is cheaper, and far less precise per task.
Who should conduct the study?
Someone independent of the team being observed, with the team told why in advance. Covert timing destroys trust and reliably produces slower, distorted results, while sharing the raw timings afterwards makes the standard hold up far better.
When benchmarking delivery capacity against the market, source partners and operators can compare across the Outsource Accelerator hubs.
Independent
