The aim of this research work is to study how eXtreme programming could be combined with ISO 9000:2000 standards to improve Nigerian software development processes. The combination of these models will enable organizations take advantage of models’ strengths and compensate for their weaknesses in enhancing continuous software process improvement and rapidly responding customer’s changing needs. This was achieved by adopting a model in balancing ISO and eXtreme programming in software projects. This allows organization to determine whether to choose a pure method (eXtreme programming or ISO) or mixed methods (eXtreme programming and ISO) that will be most successful in executing software projects. Also developed was another strategy in modifying eXtreme programming practices to reflect ISO 9001:2000 standard requirements. / The aim of this research work is to study how eXtreme programming could be combined with ISO 9000:2000 standards to improve Nigerian software development processes / C/o Patrick O. Nordkapsgatan 8,Kista, 164 36, Stockholm Tel:+46-704214035, e- mail address: edisonerhas@yahoo.com