The purpose of this research were to 1) study the production factors and efficiency of fireproof suit; 2) analyze the three line balancing models of fireproof suit; and 3) make comparison of production efficiency for fireproof suit’s manufacturing processes. A group of representative sample for assessments is 90 dressmakers of Creative Polymers Co. Ltd. The used tool for collecting data is the data recoding form consisting of production process list data recording date processing operation and duration of processing. Accordingly put the sewing line layout and make production test with the three line balancing models of fireproof suit then record all data and entry all data to SPSS program to average statistics on percentage and standard deviation. The research showed that the improvement of the three line processing models of fireproof suit comparing to the data of the three line balancing models are identified that C model increased from traditional production system 74.05 percentage B model increased from traditional production system 57.51 percentage then A model increased from traditional production system 48.53 percentage. The result showed that the fireproof suit’s production processing of Creative Polymers Co. Ltd. ought to take the C model in order to fasten production process and augment better quality. A minimum process of producing is amount of 110 steps with less time per one unit; minimum 177.41 minutes; with 30 workers; and 27 machines. The waste product of the three line processing models: A B and C model; not over 20 percentage during 8 hours of working. It shows that the c model has the least of waste product. The over operation that product has not much wasted not include in choosing the model for improving production efficiency and C model

At present a problem found in the soft candy producing process in the food producing department of Company Case Study is time-consuming roller washing process due to an ineffective washing process. A roller is washed one by one from a total of 10 roller (a set) in one machine. As a result the operation rates of other producing processes have been forced to delay. The objective of this research is to resolve the problem found in the process of roller washing by designing a machine for washing a set of roller per time. The research begins from examining design concepts of roller washing machine from patents and the current quantity of water and stream used for washing before conducting design of a new soft candy type roller washer machine. And eventually the efficiency of new roller washer machine is compared with current one. The findings indicate that the newly developed design can reduce washing period from 24.48 minutes/set to 5.56 minutes/set and increase operation time by 18.92 minutes or accounting for 77.28 percent. Meanwhile water quantity used in the process is reduced from 124.82 liters/set to 28.35 liters/set and stream quantity used in the process is also contracted from 0.83 kilogram/hour/set to 0.18 kilogram/hour/set. This reduction can save expenses equal to 28795 baht/year. As the budget for making new roller washer machine is 53000 baht and payback period is only 1.84 year.