Work Study & Methods Engineering Flashcards

In motion economy principles, which of the following is recommended for efficient hand motions?

Answer: Both hands should begin and complete motions simultaneously

Principles of motion economy state that both hands should begin and complete motions simultaneously to maximize efficiency and balance workload.

A flow process chart uses which symbol to represent an 'operation'?

Answer: Circle

In ASME flow process charts, a circle represents an operation — an activity that changes the physical or chemical characteristics of an item.

Which of the following is a predetermined motion time system (PMTS)?

Answer: MTM

Methods-Time Measurement (MTM) is a predetermined motion time system that assigns standard times to basic human motions without the need for stopwatch timing.

In work measurement, the number of observations required in time study is primarily determined by:

Answer: The desired accuracy and confidence level

The sample size in time study is statistically determined based on the desired accuracy (precision) and confidence level to ensure reliable results.

Which chart is most useful for analyzing the path of a worker's movement within a work area?

Answer: String diagram

A string diagram uses a scaled layout drawing and string to trace and measure the actual path and distance traveled by a worker in a work area.

Therblig symbols were developed by which industrial engineer?

Answer: Frank and Lillian Gilbreth

Frank and Lillian Gilbreth developed therblig symbols (an anagram of Gilbreth) to classify and analyze fundamental human motions in work study.

In method study, the critical examination technique uses which primary questioning sequence?

Answer: What, Where, When, Who, How — and Why for each

Critical examination asks What, Where, When, Who, and How for each activity, followed by 'Why' to challenge necessity and identify improvements.