Modelling and simulation study, Mechanical Engineering

A city owns and operates a garage in which maintenance and repair work is performed on city-owned vehicles. Included among these vehicles are motor-pool cars, heavy-duty trucks, and so on. City officials are receiving pressure from the police force to keep the police cars operational and they are considering extending the 8 hour work day of the garage by hiring a part time mechanic to work on the vehicles after the regular mechanic has finished his work day.

Project Goal

Determine the effect of extending the work day by 2, 4, 8, and 10 hours to see the effect on keeping the police cars available.


To measure the performance of the garage, output of interest includes

• the average number of police cars serviced in a day and

• the average time a police car resides in the garage from arrival to completion of the servicing.

SUI Details

The city is not large; as a result, the garage is equipped with only one service bay, and employs only one mechanic. This means that service can be performed on only one vehicle at a time. All of the city-owned vehicles are regularly scheduled to come in to the garage for maintenance work. Vehicles scheduled to come in on a given day are all left at the garage at the end of the preceding day. They are therefore already waiting at the garage when each work day begins. A work day itself consists of 8 hours.

Under certain conditions, regularly scheduled maintenance work which is in-progress can be interrupted, so that the service bay can be used for a more important purpose. In particular, the city attempts to keep a full fleet of police cars operating at all times. The police cars are in use 24 hours per day, under demanding conditions. Whenever there is a problem with one of these cars, the car is brought immediately to the garage for unscheduled service. If another vehicle is undergoing scheduled maintenance at the time, the just-arrived police car is permitted to preempt the service bay, so that its repair can begin without delay. However, a police car in need of unscheduled repair is not permitted to preempt another police car on which unscheduled repair is in progress. Of course, if the garage is not open when they arrive, they must wait until 8 am before servicing can begin.

Posted Date: 3/26/2013 1:39:41 AM | Location : United States

Related Discussions:- Modelling and simulation study, Assignment Help, Ask Question on Modelling and simulation study, Get Answer, Expert's Help, Modelling and simulation study Discussions

Write discussion on Modelling and simulation study
Your posts are moderated
Related Questions
CONSTRUCTIO N FEATURES : Comprises of a water drum which is connected to two headers at the front and back ends. The headers are connected by large number of water tubes which

Explain Clamping Devices A clamp is a device that holds the work piece firmly against the locators provided and also resists all forces generated by the cutting action of

working principle of land fill bio gas plant

Determine hardness of material: Hardness is surface property. It can be defined as resistance of material against permanent deformation of surface in the form of scratch, inde

What is specific gravity? what do you mean by 1pascal? Concept of pressure difference? Sol) The "specific gravity" of a meterial is the ratio of its density to the density of

Explain concepty of Worktable in radial drilling machine The worktable is supported on an arm mounted to the column. The worktable can be adjusted vertically to accommodate dis

An amount of air contained in a rigid container is at  T1 = 300 K.  After adding 450 kJ of heat, the air temperature increases to  T2 = 430 K.  Determine the mass of air,  m [kg],

Calculate the Machining Time and the Material Removal Rate A through hole of 40 mm diameter and 50 mm depth is to be drilled in a mild steel component. The cutting speed can b

Predictive Control Algorithms Escaping Scheduling Errors via Partial Look-ahead Since previously mentioned above, the heuristic priority rules that are normally utilized in