<p style="text-align: justify;">CV.XY-Bandung merupakan perusahaan konveksi yang memproduksi jilbab. Untuk dapat bersaing, perusahaan harus mampu meningkatkan produktivitas dan mengurangi biaya operasional perusahaan.   Dari hasil pengamatan, CV. XY-Bandung belum memiliki tata letak yang baik. Hal ini terlihat dari cara penyimpanan bahan baku di gudang yang belum mengikuti kaidah tata letak gudang. Pada gudang bahan baku, kain diletakkan secara acak sehingga menyulitkan pencarian, kapasitas gudang bahan baku saat ini dikeluhkan tidak mencukupi kebutuhan. Parameter tata letak gudang bahan baku yang baik adalah dipenuhinya ruang secara maksimal dan pemenuhan terhadap permintaan bahan baku yang lebih cepat. Pada penelitian ini, metode <em>class-based storage</em> dan penggunaan rak, memisahkan kain berdasarkan jenis kain di gudang bahan baku mampu memberikan peningkatan kapasitas gudang. Dengan rancangan tata letak gudang bahan baku usulan dapat meningkatkan kapasitas gudang, sehingga mampu memberikan ruang kosong untuk 1600 <em>polybag</em>.</p><h6 style="text-align: center;"><strong><br /></strong></h6><p style="text-align: justify;">CV. XY-Bandung is convection produsen that produce jilbab. To be able competing with others, produsen has to keep improving productivity and do cost efficiency. From observation, CV. XY-Bandung has not had a good layout. It is shown from raw material inventory in storage that has not using storage layout theory. In the storage of raw materials, fabrics are placed by random, make it difficult to search, and the storage of raw materials capacity is unable to fulfill demand. The good parameters for storage of raw materials are optimal utility and fulfillness of raw material demands faster. In this research, class-basedstorage method and shelf, separate fabrics are based on type of fabric in raw material storage that able to improving storage capacity. By proposes the design raw material storage layout, it should be able to increasing storage capacity, thus, it will be able to give space for 1600 polybag.</p>

This research is to address a problem of scheduling batches consisting of multiple item parts processed on a batch processor where each item requires a certain processing time which may differ from others. A number of parts are defined as a batch and processed simultaneously with sharing a set up time. A batch can be formed of the parts with different type of item and the processing time of batch equals the longest processing time of parts in the batch. It is assumed that an excessive duration of processing the parts will not lead to any defect, but increase the operating cost. The completed part must simultaneously be delivered at common due date, d. The objective is to minimise total actual flowtime of parts through the shop. A solution procedure to solve the problem is proposed and numerical examples are shown.

This research addresses a batch scheduling problem for single item parts with multi due date on m heterogeneous batch processors. The objective is to minimise total actual flowtime of parts through the shop. The total actual flowtime of parts in a batch is the multiplication of the interval between batch arrival time and the due date by the number of parts in the batch. Using the actual flowtime as the objective means it is oriented to satisfy the due date as a commitment to customers, and simultaneously to minimise the length of time of the parts spending in the shop. An algorithm to solve this problem is proposed.

This study is inspired by a batch scheduling problem in metal working industry which guarantees to satisfy a due date as a commitment to customers. Actual flowtime adopts the backward scheduling approach and considers the due date. Using the actual flowtime as the objective means that the solution  is oriented to satisfy the due date, and simultaneosly to minimize the length of time of the parts spending in the shop. This research is to address a problem of scheduling batches consisting of multiple items of parts processed on a batch processor where the completed parts must be delivered several time at different due dates. We propose an algorithm to solve the problem.

Abstract. CV. X is a company engaged in the food industry. One of the products produced is steamed chocolate brownies. High consumer demand for these products causes companies to have to produce in large quantities so that demand can be met. However, the company always produces defective products in large quantities, which is about 2.13% of the production and there is also waste that causes the production flow to be inefficient to the maximum. Therefore, the lean six sigma method is used as an effort to reduce waste and improve quality. SIPOC diagram, current state value stream mapping and 7 waste questionnaire were conducted to identify waste. It was found that the dominant types of waste that occur are defects, transportation and waiting. Process Cycle Efficiency (PCE) is used to measure the efficiency level based on the comparison of the processing time and production lead time values from the VSM mapping, the PCE current state value is 57.14%. DPMO and Sigma Level are used to measure the company's sigma capability. The resulting average sigma level value in April – June 2021 is 2.84. Waste problems in CV.X are caused by human, material, machine, method and environmental factors. Efforts were made to improve the efficiency and level of company sigma. Recommendations for improvement are carried out by providing training to operators, increasing work supervision, making work standardization visually, scheduling machine maintenance, increasing the number of trolleys, adding dough boxes equipped with filters, designing visual controls for work in process reports, redesigning production layouts (Re-layout), as well as applying kaizen blitz. Abstrak. CV. X merupakan salah satu perusahaan yang bergerak pada bidang industri pangan. Salah satu produk yang dihasilkan adalah brownies kukus cokelat. Permintaan konsumen yang tinggi terhadap produk tersebut menyebabkan perusahaan harus memproduksi dalam jumlah yang besar agar permintaan dapat terpenuhi. Namun perusahaan selalu menghasilkan produk cacat dalam jumlah banyak yaitu sekitar 2,13 % dari hasil produksi dan juga terdapat waste yang menyebabkan aliran produksi tidak efisien secara maksimal. Oleh karena itu, metode lean six sigma digunakan sebagai upaya untuk mereduksi waste dan meningkatkan kualitas. Diagram SIPOC, value stream mapping current state dan kuesioner 7 waste dilakukan untuk mengidentifikasi waste. Ditemukan bahwa jenis waste yang dominan terjadi yaitu defect, transportasi dan menunggu. Process Cycle Efficiency (PCE) digunakan dalam mengukur tingkat efisiensi berdasarkan perbandingan nilai processing time dan production lead time hasil pemetaan VSM, diperoleh nilai PCE current state sebesar 57,14%. DPMO dan Level Sigma digunakan untuk mengukur kapabilitas sigma perusahaan. Dihasilkan rata-rata nilai level sigma pada bulan April – Juni 2021 adalah 2,84. Permasalahan waste di CV.X disebabkan oleh faktor manusia, material, mesin, metode dan lingkungan. Dilakukan upaya perbaikan untuk dapat meningkatkan efisiensi dan level sigma perusahaan. Rekomendasi perbaikan dilakukan dengan memberikan pelatihan kepada operator, peningkatan pengawasan kerja, membuat standarisasi kerja secara visual, melakukan penjadwalan perawatan mesin, penambahan jumlah trolley, penambahan box adonan yang dilengkapi saringan, perancangan visual control untuk report work in process, perancangan ulang layout produksi (Re-layout), serta menerapkan kaizen blitz.