In this case study, we discussed the SME’s mushroom that have problems about financial as well as technical problems.  In financial aspects, the SME do not have correct financial records to determine selling price. In technical problems, it faced the absence of product’s certification as proven a product fulfill a standard that required by market. This situation made SME's performance not good, even though these products are really needed by the market. This study aims to improve the SME in technical and non-technical aspects. We use SIMILAR (state the problem; investigate alternatives; model the system; integrated; and re-evaluate) approaches to develop an integrated project design.  We investigated that in practice, there are still many SMEs that have not kept their accounting books and reports properly. The implementation of accounting bookkeeping to provide informative financial reports is still difficult for SMEs. SMEs products that have a guarantee will have a higher selling value than similar products that do not have certification. SMEs need to meet good food production methods for Home Industry (IRT), halal standards and meet food safety aspects. Therefore, it is measured on the object of study which refers to the IRT standard. Measurements are made to measure the incompatibility of the IRT that occurs, then corrections are made based on the mismatch and maintain food safety in the production process. Several alternative solutions that are implemented will provide SMEs results that are by the technical standards of oyster mushrooms’ house, and are entitled to apply for CPPB-IRT and SAK EMKM certifications.