Most products suffer from a slow, silent accumulation of features that nobody uses but everyone is afraid to delete. The Feature Value Decay Index provides the necessary cover for product leaders to move beyond the 'more is better' fallacy. By mapping the actual utility of a feature against the engineering and support tax it levies, you gain a clear view of which parts of your product are assets and which are merely expensive museum exhibits.
This index shifts the conversation from subjective debates about 'what users might want' to a cold, hard look at ROI. When a feature's value drops below a specific threshold, it triggers a structured sunset review. This process depoliticizes the act of pruning, allowing teams to focus their limited cognitive and engineering bandwidth on high-impact outcomes rather than maintaining legacy clutter.
Industry case01
The Dashboard Graveyard
FinTech · CPO
A mid-sized banking platform realized that 70 percent of their custom reporting widgets were accessed by fewer than five users per month. By applying the Feature Value Decay Index, they identified that these widgets were consuming 15 percent of their engineering sprint capacity due to constant API maintenance. They moved toward consolidating these into a single, flexible reporting engine.
Takeaway: Prioritize the health of the core experience by identifying and sunsetting low-utility features that drain engineering resources.
Executive perspective02
The Cost of Complexity
Enterprise SaaS · CxO
As a leader, you often feel the pressure to ship new capabilities to satisfy sales requests. However, I have found that tracking the decay index forces the organization to acknowledge that every new feature is a long-term liability. We now treat every feature as a loan that must be paid back through consistent usage or eventually retired.
Takeaway: View every feature as a long-term operational commitment that requires a clear path to sustained value.
Before and after03
From Bloat to Focus
Consumer Mobile · PMO
The team previously measured success by the number of features shipped per quarter, leading to a bloated app that confused new users. After adopting the Feature Value Decay Index, they shifted their focus to pruning underperforming features before launching new ones. This resulted in a 20 percent increase in core feature engagement and a significant reduction in support tickets.
Takeaway: Shift the team's focus from output volume to the sustained utility of the existing product surface.
Cautionary tale04
The Feature Trap
Healthcare Tech · CPO
A health-tracking startup kept adding niche diagnostic tools to appease a vocal minority of power users. They ignored the rising maintenance costs until the core patient-monitoring feature became unstable due to technical debt. They eventually had to pause all new development for six months to stabilize the platform, losing significant market momentum.
Takeaway: Monitor the maintenance cost of niche features to ensure they do not compromise the stability of the core product.
