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Purpose: This paper aims to examine organizational information systems based on Web 2.0 technology as socio-technical systems that involve interacting relationships among actors, structure, tasks and technology. Alignment within the relationships may facilitate increased technology use; however, gaps in alignment may impede technology use and result in poor performance or system failure. The technology examined is an organizational wiki used for collaborative knowledge management. Design/methodology/approach: Results of a survey administered to employees of an organization providing cloud computing services are presented. The research model depicts the socio-technical component relationships and their influence on use of the wiki. Hierarchical latent variable modelling is used to operationalize the six main constructs. Hypotheses propose that as alignment of a relationship increases, wiki use increases. The partial least squares (PLS) method is used to examine the hypotheses. Findings: Based on the results, increased perceptions of alignment among technology and structure increase wiki use. Further analysis indicates that low usage may be linked to gaps in alignment. Many respondents with lower usage scores also indicated "low alignment" among actor-task, actor-technology, and task-structure. Research limitations/implications: The sample size is rather small; however, results may give an indication as to the appropriateness of dimensions chosen to represent the alignment relationships. Socio-technical systems theory (STS) is often utilized in qualitative studies. This paper introduces a measurement instrument designed to evaluate STS through quantitative analysis. Practical implications: User acceptance and change management continue to be important topics for both researchers and practitioners. The model proposed here provides measures that may reveal predictive indicators for increased information system use. Alternatively, practitioners may be able to utilize a diagnostic tool as presented here to assess underlying factors that may be impeding effective technology utilization. Originality/value: The paper presents a diagnostic tool that may help management to better uncover misaligned relationships leading to underutilization of technology. Practical advice and guidelines are provided allowing for a plan to rectify the situation and improve technology usage and performance outcomes.