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The current study examined the impact of financial aspects in achieving sustainable public procurement at the Zanzibar Urban Services Project. To achieve this objective, the study used a questionnaire and documentary review checklist to collect data on identifying the impact of financial aspects on sustainable public procurement. The study used a case study design using Zanzibar Urban Services Project. Both primary and secondary data were collected through questionnaires and documentary reviews. The researcher employed the probability sampling technique specifically stratified sampling technique to sample 107 out of 153 individuals from the field and content analysis for documentary review. Descriptive analysis was used to analyse preliminary data and lastly multiple regression analysis modals was used to measure the relationship among variables. Study results indicated that in spite of the contribution of financial aspects in procurement, there is a challenge of undermining the emphasis of other non-financial aspects in procurement procedures. It was also confirmed that there is a need of balancing between financial, social and environmental aspects which are argued to achieve sustainable public procurement.

This paper presents the structure and contexts of transaction costs and competitive tendering. The model is proposed as the first step in the development of a causal link between transaction costs and competitive tendering in the public sector. It draws upon the theory of open systems to build a structural framework. Concepts relevant to transaction costs and competitive tendering in the public sector are integrated into this framework. The subsequent papers will add concepts to the model and demonstrate a generic model fit for public practitioners, decision-makers, academicians, and bidders (suppliers, contractors, and service providers) to carry out their procurement activities in a systematic and planned manner.