Operations Management Study Notes

Forecasts for groups of items tend to be less accurate than forecasts for individual items because forecasts for individual items don’t include as many influencing factors. (T/F) F The Delphi approach involves the use of a series of questionnaires to achieve a consensus forecast. (T/F) T In order to compute seasonal relatives, the trend of past data must be computed or known, which means that for brand-new products this approach cannot be used. (T/F) T MAD is equal to the square root of MSE, which is why we calculate the easier MSE and then calculate the more difficult MAD. (T/F) F Capacity decisions often involve a long-term commitment of resources which, when imple- mented, are difficult or impossible to modify without major added costs.(T/F) T Increasing capacity just before a bottleneck operation will improve the output of the process. (T/F)F 7. Design capacity refers to the maximum output that can possibly be attained. (T/F)T Among decision environments, risk implies that certain parameters have probabilistic out- comes. (T/F) T 9. The maximax approach is a pessimistic strategy. (T/F) F A job-shop processing system generally requires less-skilled workers than a continuous pro- cessing system. F In cellular manufacturing, machines and equipment are grouped by type (e.g., all grinders are grouped into a cell). (T/F) T 12. ”Balance delay” is another name for the percentage of idle time in