เปรียบเทียบวิธี

	Formative Evaluation	Process Evaluation
สาขาวิชา	Public Policy	Public Policy
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1967	2015
ผู้ริเริ่ม	Michael Scriven	Health-promotion & MRC evaluation tradition (Saunders et al.; Moore et al.)
ประเภท	Improvement-oriented evaluation function	Implementation-focused program evaluation
แหล่งต้นตำรับ	Scriven, M. (1967). The methodology of evaluation. In R. W. Tyler, R. M. Gagné, & M. Scriven (Eds.), Perspectives of Curriculum Evaluation (pp. 39–83). Chicago: Rand McNally. ISBN: 9780528616600	Moore, G. F., Audrey, S., Barker, M., Bond, L., Bonell, C., Hardeman, W., et al. (2015). Process evaluation of complex interventions: Medical Research Council guidance. BMJ, 350, h1258.
ชื่อเรียกอื่น	Improvement-Oriented Evaluation, Developmental Improvement Evaluation	Implementation Evaluation, Implementation Fidelity Evaluation, Program Process Evaluation
ที่เกี่ยวข้อง	4	3
สรุป	Formative evaluation is evaluation conducted to improve a program, policy or product while it is still being developed or refined. The term was coined by Michael Scriven in his 1967 essay 'The Methodology of Evaluation', alongside its counterpart summative evaluation. Where summative evaluation renders a final verdict on a completed intervention, formative evaluation feeds timely information back to designers and implementers so they can fix problems, adjust components and strengthen the intervention before it is finalised or scaled.	Process evaluation examines how a program or policy was actually implemented, rather than only whether it achieved its outcomes. It documents what was delivered, to whom, how much, how well and in what context, so that outcome findings can be interpreted correctly. By assessing implementation fidelity, dose, reach, and the mechanisms and contextual factors at work, process evaluation explains why an intervention succeeded or failed and distinguishes a flawed program theory from a sound theory that was poorly delivered. The UK Medical Research Council's 2015 guidance and earlier health-promotion frameworks consolidated it as a core component of evaluating complex interventions.