Course in Modern Production Methods Volume 6

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...is more accurate in collecting costs than the continuous-flow system, although greater detail is necessary in keeping records. When many lots of similar work follow one another through the factory, some means must be adopted for keeping each separate. A good way to do this is to mark the first pieces of a new lot by putting them in a specially marked container. The last pieces of each lot should likewise be marked distinctively to indicate the completion of the lot. This prevents confusion of one lot with the production ahead and behind it. When a new lot is started, work tickets must be changed, as must also the tool record, or material record if new materials are used. One lot should be completed before a new lot of the same material is started on any operation, otherwise the work is liable to be mixed and the records become confused. In each operation a certain amount of material is likely to be spoiled. All of this must be reported so that the total of good material and spoiled material will equal the total of work started. The work in the shop should check at all times with the lot record as corrected for reported spoilage. To insure such accuracy there must be constant watchfulness in the shop. The lot record should be kept by the route clerk so that the route sheet may be checked as each operation on the lot is completed. Thus, the route sheet will show at any time the rate of progress of the lot through the factory and its present standing. Lot reports should be made as a part of the daily shop report, whether or not the entire lot has been completed so far as any operation is concerned. In some factories, such as paper mills and chemical works, it may not be convenient or desirable to separate the work into lots. Instead, the...