Most known models for SPI (e.g. SEI CMM, ISO standards and other methods derived from those mentioned) are primarily suited for large or medium organizations, but with some tailoring they provide substantial support also for the SPI in small organizations considering their specific characteristics. In the article a case of such tailoring – the PROCESSUS model – is presented. The baseline of the methodology is the integration of the CMM and the ISO 9001 together with the ISO 9000‐3. According to the integrated model and the study of different lifecycles, a set of standard procedures (SP) and standard documents (SD) was defined. Each standard procedure provides guidelines on how to perform related activities, who is involved, which documents are supposed to be used/derived within the procedure etc. The set of SP and SD is the essential help for SPI conduction – for the purpose of small companies the optimal use of suggested documents and the disposition of roles was defined. The SP‐SD set is also described in the article. Copyright © 2000 John Wiley & Sons Ltd