Abstract
The main business of PT.Jaya Readymix is supplying readymix concrete to construction projects. The key success factor to win competition in this industry is providing the high quality concrete in competitive price and on-time delivery. To support this key success factor, a company should have good operation performance. The low performance makes the customer dissatisfied and move to other company. When it happens, as the consequence, the revenue of the company will decreas. The indicators of the low performance in the company’s operationis marked with the case of unfinished Corrective Action Report (CAR) in, for example, inability to deliver product on-time and unavailability truck mixer. This research uses the Theory Of Constraint (TOC) Thinking Process to analyze process and to formulate strategy. The steps in this research include identifying and analyzing the core driver of the current company’s problems, and make the action plan to eliminate the problems. All of the process are presented in a form of visual images through a Tree Diagram which is an effect-cause-effect relationship. This research found that the root of the low performance problems of the company's operations is inability of the company to enforce employee discipline. The injected policy to this problem is conducting performance evaluation for plant employees, especially truck drivers, which means it also needs to designed Key Performance Index (KPI) are balanced. In addition, other programs such as procedures socialization, enable the slump stand 2, implementing a new wage system, and implementation of policy briefing before each workshift time is also essential for the company to win competition.
Highlights
The main business of Prerequisite Tree (PT).Jaya Readymix is supplying readymix concrete to construction projects
All of the process are presented in a form of visual images through a Tree Diagram which is an effect-cause-effect relationship
This research found that the root of the low performance problems of the company's operations is inability of the company to enforce employee discipline
Summary
TOC Thinking Process merupakan pendekatan sistematis untuk memperbaiki sistem dengan berfokus pada kendala yang dihadapi oleh sistem untuk mencapai tujuan akhir (goal). Konsep yang digunakan adalah proses berpikir yang dijabarkan melalui 3 buah pertanyaan: What to Change?, To What to Change?, dan How to Cause the Change?. Sedangkan alat aplikasi yang digunakan untuk menerjemahkan tiga konsep pertanyaan tersebut adalah lima buah diagram pohon yang dibagi dalam dua kelompok proses berpikir. Kelompok pertama disebut Sufficient Cause yang mencakup alat aplikasi Current Reality Tree, Future Reality Tree dan Transition Tree. Kelompok kedua disebut sebagai Necessary Condition yang mencakup alat aplikasi Evaporating Cloud dan Prerequisite Tree. Untuk menjawab pertanyaan “what to change?” alat yang digunakan adalah current reality tree (CRT). CRT merupakan alat dengan menggunakan dasar logika (if...,...) untuk menggambarkan situasi yang ada. Prerequisite Tree (PT) adalah tool yang digunakan untuk mengidentifikasi hambatan-hambatan tersebut dan menyusun serangkaian intermediate objective untuk mengatasinya. Kemudian merencanakan action plan yang terdapat pada Transition Tree (TT)
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