Utility Value Analysis in Software Architecture

This article is a concept explanation on UVA for architecture decisions – including sample matrix and exam questions.

In a Nutshell

Utility value analysis helps with selecting an appropriate software architecture by comparing alternatives (e.g. monolith, microservices, n-tier, EDA) based on defined and weighted criteria.

Compact Professional Description

Process:

1. Define project goals
2. Determine alternatives
3. Identify criteria (e.g. scalability, maintainability, security, effort)
4. Weight criteria
5. Evaluate alternatives (scale 1–10)
6. Calculate utility values (weight × rating) and sum them up

The result is a decision foundation that can be communicated across teams.

Exam-Relevant Key Points

• Criteria: scalability, maintainability, complexity, security, costs
• Weighting depends on project
• Rating on consistent scale
• IHK: methodical proof of decision (matrix + justification)
• Security aspects consciously included as criterion
• Supplement cost-effectiveness with TCO
• Document all calculation steps

Core Components

1. Goal definition
2. Alternatives
3. Criteria list
4. Weighting (%)
5. Rating per alternative
6. Calculation (weight × rating)
7. Comparison of total utility values
8. Interpretation + justification
9. Risk analysis as supplement
10. Documentation (architecture decision)

Practical Example (Matrix)

Criterion | Weight | Monolith | Microservices | Layered
Scalability 25% | 6 | 9 | 7
Maintainability   20% | 5 | 8 | 7
Security    15% | 6 | 7 | 6
Effort       20% | 9 | 5 | 7
Extensibility    20% | 6 | 8 | 8
→ Microservices win despite higher effort

Advantages and Disadvantages

Advantages

• Traceable architecture decision
• Comparison of technical and economic criteria
• Good for stakeholder workshops

Disadvantages

• Subjectivity possible
• Alignment can be time-consuming
• Criteria can overlap (must be avoided)

Typical Exam Questions (with Short Answer)

1. What is the purpose of architecture UVA? Comparison of architecture approaches based on weighted criteria.
2. How is utility value calculated? Weight × rating, then summation.
3. How do you reduce bias? Team validation, clear criteria, consistent scales.

Free Response

In IHK projects, a UVA can make the “Alternative Assessment” section very strong – if criteria, weighting, and calculation method are transparently documented.

Learning Strategy

1. Define three architecture alternatives.
2. Formulate criteria without overlap.
3. Calculate and justify matrix.
4. Visualize result.

Continue to https://www.irc-coding.de/nutzwertanalyse-grundlagen-kriterien-gewichtung

Further Information

1. https://arc42.org/
2. https://www.projektmagazin.de/methoden/nutzwertanalyse