Four of the employees including al and frank are full

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bays is identical so that any employee can work at any station. Four of the employees (including Al and Frank) are full-time, and three are interns who work part-time. Al and Frank are the only two mechanics permitted to do work beyond the basics, and so more involved car services can take some time getting through the shop. Most mechanics at Al’s were trained at the area vocational school, and those with particular skill are taken on as apprentices who work under Frank and Al on the more involved projects. Al provides all the tooling necessary, and is revered as a fair and caring boss. In return, Al’s employees are loyal and hard-workers; seldom is absenteeism a problem, and turnover is rare. The employee schedule for a typical week is shown in Table 1. The shop closes for one week in the winter (although somebody is usually on call that week to handle emergency services that cannot wait). The hours required, the prices charged, and the percent of customers requesting each service are shown in Table 2. 1
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Inventory Although the shop is primarily a service provider, all of the services require materials in addition to labor, and so there are inventory considerations that Al must manage. For example, to maintain the cleanliness of each car brought in for service, plastic seat and steering wheel covers and paper floor mats are utilized. These must always be in stock, as Al learned the hard way once early in his career that these items are significantly cheaper than replacing an oil-stained seat cloth! Each client requires at least one set of these items, however it is not unusual that more than one set is used if the original is torn during service. Supply deliveries of protective coverings take one week for delivery. Historically, an average of 400 seat coverings is used each week with a standard deviation of 20 seat coverings. A 98% service level is desired. If supply gets too low, it is possible to request an emergency delivery of coverings from the supplier, at a substantial upcharge.
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