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Abstrak :
Penelitian ini, bertujuan mengembangkan model penentuan due date melalui penjadwalan batch untuk melakukan pemenuhan (Model 1) dan penentuan (Model 2) due date dengan mempertimbangkan defect rate. Pada sistem produksi job shop dinamis mesin parallel yang memproduksi muti-item berstruktur multilevel. Ukuran performansi yang digunakan yaitu total actual flow time. Proses penjadwalan dilakukan dengan menggunakan teknik penyisipan (insertion technique), yaitu melakukan penyisipan operasi-operasi disemua posisi pemproses yang mungkin pada semua mesin yang tersedia. Pemilihan posisi didasarkan pada kriteria tertentu dengan memperhatikan terpenuhinya semua urutan proses (routing) dan hubungan proses pendahulu yang ada diantara setiap operasi. Permasalahan yang diselesaikan dalam penelitian mencakup kondisi statis dan dinamis. ......This research, aims to develop due date determination model trough batch scheduling to accomplish the due date (Model 1) and due date assignment (Model 2) with defect rate consideration. On dynamic job shop machines parallel that produce multi- item structured multi-level. The measurement of performance used is the total actual flow time. Scheduling process is done by using the insertion technique, perform insertion operation at all position that may be available on all machine. The selection criteria are based on a specific criteria with respect to fulfillment of all the process sequence and predecssoe existing between each operation. The problem are solved in the static and dynamic conditions.

Abstrak :
Most classical scheduling approaches deal with single products, single machines, and static manufacturing environments. In real-world manufacturing systems, however, scheduling can be assigned for multi-item production on multimachines in a dynamic environment in which unexpected new orders may be received. This paper focuses on scheduling problems in an assembly job shop with parallel machines that produce multi-item multi-level products. Models were developed for due date fulfillment and due date assignment in static and dynamic conditions, with the objectives of minimizing total actual flow time, while considering the defect rate at each stage of the process. The insertion technique was used in the scheduling process; insertion can be performed in batch operations at all available positions on all machines. A hypothetical case of job shop scheduling problems associated with multi-item, multi-level production on parallel machines was studied, and the computational results demonstrated the validity of the proposed algorithms.