Objectives of this research To study and find the cause of loss of ancient mantou products that have wrinkled faces and improve the work process of people and machines that affect loss in the production process. From a study of the production process, it was found that ancient mantou lost the most, up to 100% per production batch. From analyzing the causes of the production process using fishbone charts and collecting data from the actual main process. It was found that the factors affecting the loss of ancient mantou include the operating conditions of the machinery such as temperature, time for resting the dough, and the use of steam in ancient mantou. The results of the study found that the temperature of water used in production There are different temperatures of 2 production batches per day. and the conditions of the air blast cabinet used to rest the dough and the steam cabinet used to bake traditional mantou. The results of the study concluded that Dough resting conditions: 34 degrees Celsius, duration 30 minutes, steam treatment 97 degrees Celsius, duration 8 minutes. You will see a clear change in the product for the better.
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