A study of some factors affecting normal output rate and percentage yield of filleting cod

King, Hedley Winston. (1976) A study of some factors affecting normal output rate and percentage yield of filleting cod. Masters thesis, Memorial University of Newfoundland.

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Abstract

The purpose of this study was to investigate some factors affecting the normal output rate and percentage yield of filleting cod. The man-machine relationships chosen for inclusion in the study included the effect of overall fish length upon the normal output rate and yield of filleting, the effect of the experience of the filleter upon each of the aforementioned factors, the effect of work table layout upon filleting rate and the effect of cutting time upon percentage yield. -- The aforementioned study was carried out at a small fish processing plant utilizing five filleters randomly selected from the work force. These filleters were asked to fillet boxes of gut-in codfish, of various size categories, the performance rating and weight of the fillets produced being recorded. From these results the normal input, output and percentage yield was calculated. -- An analysis of the results of this study showed: -- 1. A linear relationship between input, as pounds per hour, and length, input rate increased as the length increased. -- 2. A linear relationship between input, as fish per hour, and length, the time required to fillet a fish increased as the length increased. -- 3. A linear relationship between output and length, the quantity of fillet produced increased as the length increased. -- 4. Little or no relationship between percentage yield and length. -- 5. The indication of a correlation between speed and yield for two of the four filleters used in the study. -- 6. A reduction in (a) unproductive activities (33 percent reduction in time taken for the get fish motion, 19 percent for the place fillet motions), and (b) the number of eye fixiations (22 percent reduction in time) by conversion from a group to an individual work place filleting table. However, the aforementioned conversion would introduce certain non- productive miscellaneous activities (get box of fish, get fillet pan, place empty fish box, place pan of fillets) into the filleting cycle, said activities taking up to 30 - 36 seconds between the filleting of each box of fish (4 to 18 percent, depending on the size of the fish, of the total cycle time per box of fish filleted).

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