In 2018, PCM Construction Material Co., Ltd. has produced Precast concrete slabs for use in residential homes and buildings about 30 million square meters representing over 300,000 home units, and the factory will produce prefabricated slabs with a flat belly, prefabricated slabs with three legs, prestressed concrete piles, glass fiber reinforced concrete, soundproof walls, precast concrete building walls, precast concrete houses, precast concrete columns, and beams for use in the construction of residential buildings. Currently, this case study factory produces 3-legged floor slabs, with the largest production reaching 12 million square meters. Manufacturing processes are according to different steps. From having received an internship, the factory wanted to reduce the working time of the mortar box pick-up station, which requires up to four people to pick up. It takes a lot of time to pick up the mortar box and the mortar box that is damaged from pick-up by about 120 boxes per month or 1,440 boxes per year. From the factory data each month, the production process is delayed, which may be caused by the material and design of the mortar box that is not standardized (Simachokdee, 2013). It applied the principles of industrial engineering of 7 tools such as fishbone diagram, flow process chart to increase the production process of precast concrete slabs. Picking methods are, therefore, a waste of time in production. The researcher created this project to explore the production of precast production slabs, design a new type of mortar box, organize a picking-up method, and select the correct pick-up tools to be applied in the factory using the method eliminate, combine, rearrange, and simplify (ECRS) with the research (Patanaprichawong, 2016) to increase production efficiency and reduce the time to produce the Precast production slaps.