Agenda - 04-21-1987 - Laserfiche WebLink

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Page 4 maintenance list; in 1981 had two sanitation trucks while we currently maintain four. In addition, each new vehicle model brings new technological challenges, such as electronic ignition, fuel injection, on-board computers regulating engine functions, or advanced hydraulics which operate a sanitation packer unit. A model presented by APWA, presents an equivalency formula, which is an attempt to place all vehicles on an equal basis as dictated by their usage. For example, a normal annual mileage per vehicle is 12 , 000 miles. Therefore, according to the formula, a vehicle which has an annual mileage of 24, 000 miles has an equivalency of two vehicles. Likewise, this formula attempts to recognize that while passenger car and a sanitation truck are each one vehicle, the sanitation truck will require more repair hours simply due to the complexity of the machinery involved. Based on this formula, Orange County has a 125 vehicle fleet but, has a vehicle equivalency of 174. Mechanic to vehicle ratio we reviewed several methods used by the American Public Works Association to ascertain a recommended ratio of vehicles per mechanic. The recommendations covered a wide range with the top of the range indicating for our current fleet level of 125 vehicles we should have one supervisor and eleven mechanics with a lead mechanic for every five to six working mechanics. Realizing the loftiness of this recommenda- tion we have opted to use another formula which utilizes actual Orange County repair data. The results from this method indicate that Orange County, based on actual fleet size of 125 vehicles, should have one supervisor and 2 .4 working mechanics. When the vehicle equivalency (174) is factored in however, there is a need for 3 .4 mechanics plus one supervisor. As a matter of explanation of the process which yielded these results, the net available hours per year are divided by a key volume indicator which yields the number of vehicles each mechanic . should be able to handle. The data used to arrive at the key volume indicator comes from actual repair orders at the County garage last year. PROFILE OF FLEET During the past year Orange County staff have begun a process to schedule vehicles for replacement before they become such a large maintenance liability. In the past there was no formal effort to keep the fleet at an optimum operating age. The following data was assembled as of April 13 , 1987 and tends to prove our theory that vehicles should be disposed of around 100, 000 miles. Circumstances may cause an upward or downward adjustment in that mileage, but overall 100, 000 miles appears to be the most advantageous point of disposal.