Abstract:
Company needs the high accurate cost for business decision, as new market entry, in order to increase operating performance under high competition. Company need actual cost of T4 for profit analysis whether company should enter to Electronic-appliance industrial part market, as large new market or not. Otherwise company has to promote T10 as taking market share from other competitior. Besides company have the budget limitation for new investment and it need to utilize the huge remain capacity. However the current cost calculation could not provide the accurate cost by product. This research objective is the process-cost calculation accurate improvement of Tempered glass because business strategic decision needs this crucial information. The current cost-calculation method average all process cost to each product equally so it could not reflect actual cost from each product resource utilization. Activity Based Costing concept (ABC) will be applied to clearly separete the actual cost of each product. This research separate cost group by main activity that utilize business resource then analyze each activitys Cost Driver. The production activities are separated into 5 groups (Cutting, Edging, Drilling, Temper and Heat Soak Test) while 4 production-support units are Eng & Maint, Planning, QA and Purchase. Cost Driver data of each activity is gathered to calculate each product actual cost then comparing with current cost calculation method to increase the advance competitiveness, suitable cost, by activity improvement. Hence sales promotion of each product will be adjusted based on each products profitability The T4 actual cost, calculated from Activity Based Costing concept (ABC), is higher than current cost around 700 Baht/ unit and also higher than the new-market price, resulting to additional loss 476 Baht / additional-sales unit. Company finally decided to promote the T10 as its actual cost is lower than current cost around 135 Baht/ unit so its profitability is higher than T4