How many types of hand motions are identified in the therblig system?

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Multiple Choice

How many types of hand motions are identified in the therblig system?

Therbligs are the basic, observable hand motions used to analyze manual work and improve motion efficiency. There are 17 core therbligs, which form a complete, non-overlapping set of actions that can be combined to describe any hand-based task. This finite list lets analysts break a task into simple units, so they can identify unnecessary motions and idle time. Some texts count an extra motion (often a separate “wait” or cognitive planning phase) as a distinct therblig, which leads to 18 in that framing, but the standard teaching most MOB courses use centers on the 17 core motions. So, the answer reflects that conventional core set of hand motions.

Therbligs are the basic, observable hand motions used to analyze manual work and improve motion efficiency. There are 17 core therbligs, which form a complete, non-overlapping set of actions that can be combined to describe any hand-based task. This finite list lets analysts break a task into simple units, so they can identify unnecessary motions and idle time. Some texts count an extra motion (often a separate “wait” or cognitive planning phase) as a distinct therblig, which leads to 18 in that framing, but the standard teaching most MOB courses use centers on the 17 core motions. So, the answer reflects that conventional core set of hand motions.

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