Meta-evaluation theory explores the definitions, processes, and systems of evaluation, emphasizing its role in supporting decision-making through the collection and analysis of both qualitative and quantitative information. It outlines various types of evaluations (context, input, process, product) and their corresponding decision-making implications while also detailing the criteria for assessing evaluations, such as scientific, practical, and prudential criteria. The document underscores the importance of meeting client needs and ensuring the relevance and credibility of the information provided for effective decision alternatives.