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Total time of job is always involve total work content and total ineffective time,total work content include basic work content, work content added by design defects and work content added by process defects.Total ineffective time include ineffective time due to shortcomings of management,worker control and layout & movements.

Basic work content is the irreducible minimum time theoretically required to producing one unit of output in a perfect condition.

However, the types of ineffective time are:

1, Work content added by design defects

-bad design of product prevent use of most economics processes.

2, Work content added by process defects

-wrong machine used.

3, Ineffective time due to shortcomings of management

-bad planing of work and order adds idle time of men and machines.

4, Ineffective time due to workers control

-Absence, lateness and idleness of workers cause by lack of supervising.

5, Ineffective time due to layout planning and movement involve

-Bad layout causing wasted movement and time.

By senen (part time student from PSB academy).......

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