Policy Enforcement System for Software Change Control
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Solution Overview
Problem
Current change management systems lack the ability to automatically enforce complex change policies across different stages of the software development lifecycle, leading to unauthorized changes and potential system failures.
Innovation Solution
A Policy Enforcement system that maps physical source control system codelines to projects, maintains project and codeline state information, and defines change management rules to evaluate and enforce policies, using components like Change Capture, Policy Evaluation and Enforcement, and Policy Database to automatically allow or deny changes based on defined policies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If management oversight with basic access controls is used to enforce change policies, then system simplicity is maintained, but unauthorized changes occur and policy compliance cannot be automatically enforced
Solution Approach 1:
A policy enforcement module is introduced as an intermediary between users and the source control system. This module intercepts change requests, evaluates them against defined policies, and either permits or blocks the changes. The intermediary handles the complexity of policy evaluation internally while presenting a simple interface to users, thus improving policy compliance without significantly increasing perceived system complexity.
Solution Approach 2:
Change policies are defined and configured in advance before any actual changes occur. The system pre-establishes rules regarding who can check-in, merge, branch, or check-out code at various stages of the development process. This preliminary configuration allows the automated enforcement mechanism to operate efficiently without requiring complex real-time decision-making, resolving the contradiction between reliability and complexity.
2Reliability
If all or nothing access control is implemented, then system operation is simple, but nuanced change policies cannot be enforced and unauthorized changes occur
Solution Approach 1:
The access control system is segmented into multiple discrete policy rules that can be independently configured and evaluated. Instead of a single all-or-nothing control mechanism, the system divides authorization into granular rules covering different user roles, change types, codelines, and development stages. This segmentation enables precise authorization accuracy while maintaining operational simplicity through automated rule-based decision-making.
Solution Approach 2:
The system dynamically changes access parameters based on the current state of the development process. Different policies are applied at different stages (e.g., development, testing, production), and access rights are adjusted according to parameters such as user role, change type, and codeline state. This parameter-based approach enables nuanced policy enforcement without requiring complex manual operations, as the system automatically adapts parameters based on predefined rules.
3Reliability
If automated policy enforcement is implemented, then unauthorized changes are prevented, but system complexity increases beyond basic access control
Solution Approach 1:
The policy enforcement module is designed as a universal component that handles multiple functions within a single system. It simultaneously performs change request interception, policy evaluation, authorization decision-making, and logging. By consolidating these functions into a single multi-functional module rather than separate complex systems, the mechanism achieves reliable change control while minimizing the increase in overall system complexity.
Data Source
AI summary
A set of tools and other mechanisms automatically enforce software development change policies by providing a way to map physical source control system codelines to projects and by providing a way to maintain current project and codeline state information. The set of tools and other mechanisms also provide ways to define change management rules and policies, as well as, ways to evaluate and allow or deny each proposed change against the defined change policy.