According to multiple surveys, there is a potential to improve how processes in small software companies are supported by IT. On the path to fulfilment of this goal, it is firstly necessary to define a process model specific for small software companies. When defining the model, multiple available resources were taken into account, e.g. CMMI, ISO 12207, ISO 29110, MoProSoft, MPS.br, ERP system reference models etc. Based on these resources, the small software company process model is outlined.