Appraisal of Development and Maintenance Cost and Duration for ERP System

One of the most important features of an ERP system is that it integrates all the units of a company, such as sales, production, purchasing, inventory, accounting, and human resources, in real time and with a close relationship to each other.This integration enables total optimization and makes the business process more customer-oriented.Complaints about defects in the software, estimation of appropriate development costs, etc. are raised by the client, while complaints about unstable requirements, excessive changes, delayed delivery and non-payment of development costs are raised by the customer.This paper is a study on how to estimate the completion level and appropriate development cost and defect repair cost in a project where ERP system development is completed.Based on the completeness of the ERP system delivered by Company A to Company B and the IFPUG's FP estiamtion manual and the detailed method of the software cost estimation guide, the function point was calculated, and based on this, the appropriate development cost, development period, and defect repair cost were calculated.