Get Handbook of Precision Engineering: Volume 11 Production PDF

By A. (editor) Davidson

Long island 1974 first version McGraw Hill. Hardcover. eightvo, 276p., fabric. close to positive in Fiar DJ, very worn.

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Additional info for Handbook of Precision Engineering: Volume 11 Production Engineering

Sample text

The occupied or allocated hours for the various jobs are entered as crosses on the chart. The open spaces then indicate the hours still available in the week. If no more hours are available the job must be planned in a later period and the time schedule should be readjusted accordingly. xlx Ixl x lx lx lx IX IX Max. loading level - - - - Hours reserved for urgent jobs ~ Temporary capacity reduction due to known absenteeism due to illness etc. lxlxlxlxlxl Hours allocated to planned jobs Fig. 27.

Issue serial numbers at the first operation; j. give priority to less current products (since the current item can be drawn from stock). 7). In that case it may be useful to introduce so called 'run out' lists in order to be able to review the situation more easily. Combination of successive operations. In assembly line production this has been applied to its fullest extent. It goes together with planning the process along lines directed at the actual product. Also the elimination of separate precalculation, invoicing, shipping, etc.

At this one gate there will not be any waiting when: I. The arrival of the jobs is perfectly regular. 2. All times for the operations are equal and constant. 3. Even when the gate capacity exactly matches the demand, that is, when the utilisation factor r is 100%. In general it can be stated that the waiting time is zero (w = 0) when: 1. The deviation in the intervals between incoming jobs is zero, (sb = 0). 2. The deviation in the job operation times is zero, (sv = 0). 3. And the utilisation factor of the capacity r ~ 100%, (r ~ 1).

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