بهبود محصول کیفی از یک سیستم تعلیق موتور سیکلت در یک شرکت خودرو با استفاده از گسترش کارکردکیفیت با تجزیه و تحلیل ارزش(در مورد اندونزی)

A Motorcycle's suspension is a part of motorcycle that contributes in handling, braking, and providing safety and comfort by keeping the rider and passengers comfortably isolated from road noise, bumps and vibrations. In order to serve these functions, the suspension needs several components to be assembled as a complete motorcycle unit. Before implementing QFDVA, the company had over budgeted several related components used to isolate the unit form noise, which is preceively top priority by customer, on IDR 217,569. After implementing QFDVA, the company has found that in order to isolate the unit form noise, it shall lower its budget on those related components to IDR 194,817 or about 12% from its original budget.

n Indonesia, motorcycle plays an important role as transportation means. This is due to the lack of other cheap transportation means. This has been proven by the increasing number of motorcycle sales [1]. Therefore, people nowadays have been demanding for both good quality and comfortable motorcycle as their means of transportation. On the other side, the automotive industry for manufacturing motorcycle has also seen decrease due to competition among the players. In order to meeting consumer demands and overcoming the competition, an automotive company has to be both innovative and cost effective [2]. Most company only uses Quality Function Deployment (QFD) to produce good suspension but felt its cost-ineffectiveness due to the budget constraints. Budget constraints are made in order to keep the price to be competitive [3]. This has made the company need to analyze whether the output of QFD is also cost-effective using value analysis. Therefore, the companyuses QFDVA in order to find what function really matters and how to distribute budget limit so the company could maintain its competitiveness.1.1 Research problems Based on the above background, there are several research problems described as follows: 1. What function of suspension demanded by customers in priority order? 2. How to allocate the limited budget to design all related components in manufacturing suspension to maintain cost effectiveness? 1.2 Objectives These research problems have led the company to set its objective of the improvement initiative as follows: 1. To identify the function of suspension demanded by customers in priority order. 2. To allocate the limited budget in order to design all related components in forming suspension so that the company could maintain its cost effectiveness.

After conducting this research, we have found that: 1. The priority order of each function of suspension are as follow: D) To isolate the unit from noise (43.8%), A) As shock breaker (32.2%), B) To isolate unit from high vibrations (20.3%), C) To be equipped by dust seal (2.9%), and E) To make unit looks good (0.7%). 2. The effective cost allocation is as shown in table 2 which has enable the company to focus more on the component that required by customer. From that table we can conclude in order to focus on function of D (to isolate unit from noise), the company could only need to budget IDR 194,817 instead of IDR 217,569 or over-budgeted about 12%. For further study, we recommend using DEA (data envelopment analysis) as a decision support tool to evaluate the degree to which each design alternative satisfies the customer requirements [6].