Improving Scrum Implementation Quality in Software Development through an Integrated Capability Maturity Assessment and Decision-Making Framework

Abstract

Purpose: This study evaluates the quality of Scrum implementation in the New Corporate Website project at XYZ Bank and proposes process improvement recommendations using an integrated framework based on the Capability Maturity Model Integration (CMMI) 2.0. CMMI 2.0 was selected because it provides comprehensive Practice Areas for assessing organizational capability beyond Scrum-specific maturity models.

Methods: A convergent parallel mixed-method case study was employed involving 14 AHP experts, 17 Scrum appraisal respondents, and 3 interview participants. Quantitative and qualitative data were collected through questionnaires, semi-structured interviews, and document observations. The Analytical Hierarchy Process (AHP) was used to prioritize organizational problems, the Weighted Scoring Model (WSM) mapped the prioritized problems to the most relevant CMMI 2.0 Practice Areas, and Scrum capability was evaluated using the Key Process Area (KPA) Rating and SCAMPI C appraisal approach.

Results: Five Practice Areas were selected for appraisal. Verification and Validation (VV) was the only Practice Area that achieved Capability Level 1 with a KPA score of 96.16%, whereas Project Planning (PLAN), Process and Quality Assurance (PQA), Peer Review (PR), and Requirements Development and Management (RDM) remained at Capability Level 0. Based on the identified weaknesses, 11 improvement recommendations were formulated and organized into short-, medium-, and long-term implementation phases to support continuous software process improvement.

Novelty: This study proposes an integrated framework that combines AHP, WSM, and CMMI 2.0 to systematically prioritize Practice Areas before capability assessment. The proposed framework provides a structured decision-making mechanism that links organizational problems with capability appraisal and offers practical guidance for improving Scrum implementation and supporting continuous software process improvement.