24/09/2026
MTM: DESIGN WORK WITH EVIDENCE: NOT GUESSWORK
Predetermined Motion Time Systems (MTM) analyse defined human motions to estimate task time under specified conditions. Used responsibly, MTM can support work design, staffing discussions, ergonomic review, and balanced improvement decisions.
Apply it carefully:
• Define the task, method, conditions, and quality requirements
• Observe the work with the people who perform it
• Separate necessary motions from avoidable complexity
• Check posture, reach, force, repetition, fatigue, and accessibility
• Treat the estimate as a design input: not a demand for unsafe speed
• Validate the method in practice and review it after changes
ACTION: When reviewing task time, compare the documented method with actual work. Ask: “What does this design require from the person, and can it be performed safely and consistently?”
Never use motion-time data as a standalone productivity score. Protect privacy, involve workers, account for reasonable variation, and escalate safety or wellbeing concerns.
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