ISO/IEC 15504 measurement applied to COBIT process maturity

Purpose - The assessment of COBIT process maturity levels is fraught with a number of problems regarding the objectivity of the assessment results. Unlike ISO/IEC 15504, COBIT does not define an assessment model. The purpose of this paper is to align the behavioural aspects of the six COBIT process attributes with achievement results defined for the nine process attributes associated with the ISO/IEC 15504-2 measurement scale. The authors believe that this alignment permits a translation of the ISO/IEC 15504 assessment data into an objective COBIT process maturity rating. Design/methodology/approach - The tables presented in the paper identify the COBIT process attributes, the applicable ISO/IEC 15504 process attribute achievement results and the aggregated rating that pertains to the selected achievement results. Afinal table lists the derived COBIT processmaturity level in terms of the ratings for the ISO/IEC 15504 process attribute achievement results for an assessed process. Findings - The objectivity of the aggregated result (COBIT process maturity level) appeals strongly to end-users of this measurement result, particularly where contractual obligations must be satisfied. Practical implications - The method is useful where measurement rigour must be demonstrated in the computation of the COBIT process maturity levels. Originality/value - This assessment and computational method was developed and trialled in the second half of 2010 in the context of the assessment of 13 information technology (IT) service management processes at two different customer sites. The material is of special value to service managers in companies that have outsourced IT service management processes to external IT service providers.