Supply Chain Performance Efficiency Analysis of Oyster Mushroom Product (Part1) The development of good agro-industry in Indonesia encourages the growth of various agricultural processing businesses that utilize various types of vegetables, fruits and tubers plant. One type of vegetables that have high potential to be processed into food processing industry is oyster mushrooms. Great potential of oyster mushroom utilized by CV. Ailani to open a new business opportunity in the form of making oyster mushroom shredded. CV. Ailani cooperating with farmers partner and retailers partner to support the business activities. The Cooperation relationships are experiencing some problems such as the quality and quantity of oyster mushrooms are declining, capital turnover is long enough and the level of communications with retailer partners is less active. These problems indicate that the condition of supply chain performance is not optimal. Therefore it is necessary to analyze the efficiency of supply chain performance using DEA method that aims to know the flow patterns of goods, money and information on the supply chain of oyster mushroom product in CV. Ailani, knowing the level of efficiency of supply chain performance of oyster mushroom in CV. Ailani as well as know the alternative solutions that give improvements in the efficiency level of the supply chain performance of oyster mushroom product in CV. Ailani. This research was conducted in CV. Ailani, the selection of research sites conducted by purposive sampling due the CV. Ailani is the only agroindustry that produces the oyster mushroom becoming abon and still experiencing problems in the condition of supply chain. The number of respondents was 8 respondents who were determined by purposive sampling. The respondents are 4 farmers partner, 1 of agroindustry and 3 retailers partner. The tool analysis that used in this research is Data Envelopment Analysis (DEA) with input variables used are lead time fulfillment order, total cost of supply chain and cash to cash cycle time.