Judul: Penerapan Sistem Hazard Analysis Critical Control Point (HACCP) dan Statistical Process Control (SPC) dalam Proses Produksi Bumbu Penyedap Rasa di PT Unilever Indonesia Tbk
Abstrak: PT Unilever Indonesia Tbk built new factory, Lion, where new savoury products are produced. As one of big company who give priority to maintaining consistency and quality of products, food quality management sistem and quality control of process is very important to do. The purpose of this research is to apply HACCP system and SPC in monitoring the Aw quality of the product. The HACCP implementation methods used consisted of pre-requisite program HACCP study, and HACCP Plan preparation based on five steps and seven principles of HACCP and The SPC methods used consisted of observation and identification of problems, brainstorming, control chart, fishbone diagram, Pareto diagram and action plan. Based on the identification and determination of CCPs of HACCP, there are four groups material that are categorized as OPRP and one OPRP in the process. There is one CCP on filling process, which the product passed through a metal detector machine to prevent contamination of foreign matter in the form of metal. The conclusion of identification problem brainstorming is Aw out of standard spesification. measurement results of samples 252 batch using i-chart indicating that the process is out of control. Using fishbone diagram, why why analysis and pareto analysis,the causes of Aw problem were analyzed. it was observed that there were four main problems contributed to 82,5% causes of this case includes RH of packing hall outside the standard (25%), semi-finished goods packaging products during the process of filling opened (25%), RH of dehumidifier outside standard (25%), and unloading time (7.5%).The action plan such as material handling monitoring along the process has been implemented to solve the problems.
Keyword: 

Judul: Aplikasi Statistical Process Control dalam Pengendalian Ketidaksesuaian Kemasan Milkuat Pouch di PT Danone Dairy Indonesia
Abstrak: Quality is considered as the main factor of food processing industry. One tool that important to control food quality is Statistical Process Control (SPC). Unconformity (product reject) is one of many quality problem in all manufacturing product such as Milkuat Pouch in PT Danone Dairy Indonesia. This cooperation has a minimum limit of unconformity specification standard, i.e. it must be less than 1,7% of the actual output production. This parameter show us how much losses earned, compares to raw material and packaging material aspect of the filling process. This product consist of two main material, water and fresh milk. The purpose of this research is to apply SPC in monitoring the unconformity quality of the product in filling machine area. The method concept which used to solve this problem are observation and identification of problems, brainstorming, control chart, fishbone diagram, pareto diagram and action plan. The conclusion of problem identification is the number of unconformity in machine 15 and 16 was out of standard spesification. Measurement results of samples 125 batches (15 days production in first shift) using np-chart and p-chart of control charts, indicating that the process is out of control, and the percentage shows the unconformity product is more than 1,7%, it means there still occuring many various errors that impact to defect in the final product. The causes of unconformity problem were classifieed by fishbone and pareto diagram analysis. This analysis is done by observation of each batch production for 15 days in first shift on each machine, machine tube AC, AD, AE, and AF. The action plan has been constructed to eliminate 80% of root cause so that it would reduce the unconformity of product.
Keyword: control chart, unconformity, Milkuat Pouch, statistical process control (SPC)

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
Keyword: