Object Model for Description of the Logistical Flow at Volvo Cars Corporation -A base for simulation containing logistical flows

Abstract

This thesis is about creating an object model for the logistical flows in Volvo Cars Assem-bly Factory in Torslanda. This in order to use the object model as a base for the simulation of the logistical flows with the use of a digital source. This is something that is missing to-day. The logistical handling is based on experience and the knowledge of the truck drivers instead of rules and guidelines. This is something that Volvo wants to change. In order to make the mapping of the flows, an understanding of the logistical handling must be cre-ated. In this thesis the logistical flow within the assembly factory is described through a pre study of the flows. The method used in this thesis is based on the qualitative method. In-terviews have been conducted with technicians in order to understand the logistical flows, as well as to experts within the simulation area. This to create an understanding of the pre-requisites that a simulation tool has on the mapping that has been created in this thesis. The pre study gives the base for the main section of this thesis, the creation of the object model for the logistical flows. This has been done in Visio with a creating of a stencil with standard objects together with a mapping file. This can then be extracted through an XML file into the simulation environment digitally, which is the main goal of this project. In the analysis chapter the Visio modeling way is compared to the way of using the Fac-toryCAD model as an input for the simulation model, presented by Moorthy and Sly (2001). The conclusion is that when a mapping like this being performed the most important thing is that it is object orientated, not that a certain technique or program is used. The format should be a standard format, excepted among several users so that you do not get tied to any particular solution. For the recommendations given to Volvo the main idea is that materials that do not have an automated call to the line must be defined, categorized and placed into the layout, in the same manner as those with an automated call. This in order to make it possible to simulate all logistical flows and gain the benefits by adapting to this way of work. The mapping performed is to be seen as a way of working and not a finished solution or application. The work has much consisted of trying a new way of thinking and the prob-lems that can occur when doing so.