← All case studies Case Study № 02 · Marketing SaaS ↓80% bug injection rate
Case Study № 02

Rebuilding a dev team's delivery engine.

A Provider of SaaS Marketing Services · 6-Person Dev Team
Avg Before
Reduction
↓80%
Timeline
3 mo
Output
3.5×
Result
62% features
§ 01 — The Situation

Buried in unplanned work, with no process to fix it.

A 6-person development team at a SaaS marketing services provider was working on a legacy .NET platform with no structured sprint process. The team had no baseline for capacity, no visibility into velocity, and was constantly buried in unplanned work.

Beyond the process gaps, deeper systemic issues compounded the problem:

Developers were on islands. Each person worked in their own corner with limited shared context, siloed knowledge, and no collective ownership of delivery. When one developer hit a blocker, no one could absorb the slack.
No true product management. Reactive task assignment, not strategic prioritization.
Data integrity bugs generating a constant stream of operational cleanup work.
No sprint planning process or capacity awareness.
Significant tech debt across the legacy .NET codebase.
§ 02 — What Changed

Two phases: build the foundation, then go deeper.

The first priority was establishing a predictable sprint process. With that stable, the next phase tackled root causes:

One.
Team-based development
Structured daily collaboration replaced individual silos. Developers built shared context across the codebase, enabling cross-coverage and collective ownership of delivery.
Two.
Capacity-based planning
Sprints scoped to actual team availability.
Three.
Proper story scoping
Teaching the team what a right-sized story looks like, with clear acceptance criteria, vertical slices through the stack, completable within a sprint.
Four.
Velocity and injection tracking
3-sprint rolling averages and unplanned work measurement.
Five.
True product management
Proper backlog grooming, story refinement, and strategic prioritization.
Six.
Root-cause bug fixes
Targeting data integrity bugs that were generating constant cleanup injections, eliminating them at the source.
Seven.
Reformed dev standards
New development patterns, practices, and AI-assisted workflows.
§ 03 — The Results

Injection under control. Output growing.

Unplanned work was drowning the team. In the first two sprints, injected work exceeded what was planned — a sign that the process around the team was broken. A combination of product management reform and targeted bug fixes that eliminated faulty data at the source drove injection down dramatically.

Injection Rate
145% 19%

In Sprints 1 and 2, injected work hit 145% and 142% of committed points — the process around the team was broken. By Sprint 5, injection had fallen to 19%. Bug fixes eliminated faulty data at the source, removing the need for constant data cleanup injections.

As the process matured and the team built confidence, sprint commitments grew from 29 points to 101 points in five sprints. This isn't the team working harder. It's the planning process accurately reflecting what the team can deliver — a 3.5× growth in capacity visibility.

Feature Ratio
39% 62% of sprint on features

With data cleanup work declining as root-cause fixes took hold, the team shifted toward product value. By Sprint 5, 62% of sprint work was feature development, up from 39% in Sprint 3.

Once the dev team was delivering predictably, the bottleneck shifted. 61 points of completed dev work sat in UAT with no one testing it. Some items had been waiting for validation for over 55 days. The dev team delivered the work. The organization hadn't validated it.

When you fix the dev team, you expose the constraints that were always there but hidden behind slower delivery.

UAT processes depend on business users carving out time from their day jobs to test. That worked when the dev team was delivering a trickle. It breaks when the team is delivering a flood.

§ 04 — Key Takeaway

The team didn't change. The people didn't change. The systems changed.

Capacity-based planning, right-sized stories, root-cause bug fixes, and true product management transformed the same team from no process to outpacing the rest of the organization. The next challenge is organizational: building UAT processes that can keep up with a high-performing dev team.

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