Development a software for material requirements planning and a case study for real Huğlu

11 DEVOLOPMENT A SOFTWARE FOR MATERIAL REQUIREMENTS PLANNING AND A CASE STUDY FOR REAL HU?LU (Ph. D. Thesis) Hayrettin DÜZCÜKO?LU GAZI UNIVERSITY INSTITUTE OF SCIENCE AND TECHNOLOGY FEBRUARY 2002 ABSTRACT Material requirement planning (MRP) is a technique of management, listing and control in order to minimize investments, increase production and productivity, and to improve customer service. In this study, it is intended to decrease the stock cost with the application of MRP on a real production environment. Thus, instead of a firm bringing into mass production and especially a firm having assembly lines, on which MRP gives reasonably well results, selecting a firm that have a structure of a "cooperative" in a form of cooperation of partners, managers and procurators together, applicability of MRP is investigated. In order to realize such a purpose, "a study case" is verified on Huğlu Hunting Firearms Corporation in Konya. Changing relevant operation and process parameters of production parts, the effect of every operation on MRP system is evaluated in contrary to widespread MRP application searching raw material and part processing time effecting the lead time of production. In Huğlu Hunting Corporation Firearms, a computer program has been developed in Delphi 3.0 programming language based upon for these MRP approaches. With the primary applications, stock quantity of production is decreased considerably, with the application of MRP system on 103F.12 model rifle for two years, %60 decrease in stock quantity and %55 stock saving in relation to the cost have been achieved, and expected motions are observed on lead time of production in relating to the changes on the parameters of workbench and cut. Software has been developed in such a way that it can be used all small and medium firms with a little some changes. Science : 626.12.01 Key Words : Material Requirement Planning (MRP), Capacity Requirement Planning (CRP), Master Production System (MPS) Page Number : 129 Adviser : Assoc. Prof. Dr. Ulvi ŞEKER and Assistant Prof. Dr. Zafer TEKİNER