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Software Architecture Guide

Lightweight Approach for Software Reviews (LASR)

Explanation

Section titled “Explanation”

LASR is a review method for software systems. It is lighter than ATAM, a heavier evaluation method (see Architecture Tradeoff Analysis Method (ATAM)). LASR still focuses on the key quality attributes of the system. A quality attribute is a property such as speed or security (see Quality Attribute).

Who runs it. Two to four developers can run the review themselves. They need no separate evaluation support.

How it runs. The review is a short, moderated workshop. The moderation is game-like, so the review becomes a small team event. It works on site or remotely, and a few people are enough. First results appear within a few hours.

The four steps.

  1. Lean mission statement. The team states briefly what the review is about.
  2. Evaluation criteria. The team picks the top quality attributes of the system. Each gets a quantified objective. These objectives are the benchmark for the review.
  3. Risk-based review. The team identifies the most significant risks against those objectives.
  4. Quality-focused analysis. The team looks in depth at the controversial gaps between objectives and assessment. It also looks at cases where such gaps are missing.

Result diagram. The result diagram shows the quantified objectives as a benchmark line. This diagram drives the deeper analysis.

Risk catalogue. LASR uses a catalogue of standard risks. It comes from more than 100 earlier reviews.

Evidence of effect. A practice paper from ICSA 2026 reports on 75 independently conducted reviews. It says LASR gives actionable insights at modest effort.

Example

Section titled “Example”

A team of three developers owns a webshop. They book a half-day workshop and write a short mission statement. They pick two top qualities, such as fast checkout and high availability, and give each a number as its objective. Each person then rates the system against those objectives. The team discusses the biggest gaps in depth and notes the risks it finds.

Trade-offs

Section titled “Trade-offs”

LASR is lighter than ATAM, so it asks for less effort. It also relies on a small team and a short workshop. The facts here do not say how its depth compares with a full ATAM review.

The four LASR steps in order.

Diagram source 
flowchart LR
  A[Lean mission statement] --> B[Evaluation criteria]
  B --> C[Risk-based review]
  C --> D[Quality-focused analysis]

Checks

Section titled “Checks”
  • The review states quantified objectives for the system’s top quality attributes.
  • The review names the most significant risks against those objectives.
  • Controversial gaps between objectives and assessment are analyzed in depth.
Section titled “Related”

Sources

Section titled “Sources”