
## The Problem

Architecture review meetings had become the organisation's primary bottleneck. Every technical decision required a cross-team meeting. Meetings were scheduled weeks out. Decisions were revisited because nothing was documented. The VP Engineering estimated that 30% of engineering capacity was lost to architecture debate that never reached resolution.

The company had grown from 15 to 80 engineers in 18 months, but the decision-making structure had not evolved. Every architect could block any decision. Nothing was delegated.

## The Approach

We ran a 6-week architecture governance transformation:

### Phase 1: Decision Audit (Week 1)
- Mapped every architecture decision made (or stuck) in the previous 3 months
- Identified 5 decision types with different velocity requirements
- Interviewed engineering leads to understand friction patterns

### Phase 2: ADR Framework Design (Week 2-3)
- Introduced 5 ADR templates covering different decision contexts (strategic, tactical, operational, experimental, urgent)
- Defined a decision rights matrix mapping decision type → decider → consultation group → notification list
- Created a lightweight ADR review process that replaced the weekly architecture forum

### Phase 3: Embedding (Week 4-6)
- Ran 3 hands-on workshops with engineering teams to practice ADR writing
- Set up an ADR log with status tracking
- Coached the architecture team on delegation patterns
- Established a fortnightly architecture sync (down from weekly) focused only on decisions that genuinely required cross-team input

## The Outcome

| Metric | Before | After |
|--------|--------|-------|
| Decision cycle time | 2-4 weeks | 2-5 days |
| Blocked decisions | 12+ at any time | 2-3 at any time |
| Cross-team meetings | Weekly (3 hours) | Fortnightly (1 hour) |
| Documented rationale | None | Every ADR logged and searchable |

**Architecture decision time dropped by 60% within the first month.** The ADR log became a source of truth that new hires could read to understand past decisions. The VP Engineering described it as "the single highest-leverage process change we made in two years."

## What Changed

The shift was not about more process — it was about the right process. Before, every decision went through the same heavy gate. After, the decision rights matrix ensured that tactical decisions were made in hours, strategic decisions got the right attention, and everyone knew which category they were in. The architecture team stopped being a bottleneck and became an enabler.


How a SaaS scale-up introduced ADRs and a decision rights matrix to cut architecture review cycles from weeks to days.

Reducing Architecture Decision Time by 60%

Want Results Like These?