Small and medium enterprises are a very important piece in the world economy. The majority of software development is carried out by small —and medium— sized software development organisations. These organizations need efficient Software Engineering practices adapted to their sizes and business type. In this sense, and to support software process improvement in very small software enterprises, ISO through the SC7 has established a working group (WG24). The objective of this group is to create standard ISO profiles in order to apply them (software process improvement) in small software enterprises. This working group is establishing a common frame to describe software life cycle profiles to be used by very small enterprises.