Tech Stack Tier

This page explains Tech Stack Tier and its relevance to business operations.

Tech Stack Tier
Tech Stack Tier - Headroom HQ

D06 - Technology Coherence


Definition

A three-level classification system for operational software tools such as Tier 1 (core infrastructure: financial systems, HRIS, and CRM), Tier 2 (workflow and productivity tools), and Tier 3 (point solutions for specific use cases), each carrying a different evaluation standard, replacement cadence, and governance requirement.

Treating a project management tool with the same evaluation criteria as an ERP wastes time. Treating an ERP with the same casual evaluation as a project management tool causes costly failures.

The tier system creates proportional governance. The evaluation standard matches the decision's actual stakes.


Indicators

  • A Tier 3 tool was adopted without any formal evaluation and is now deeply integrated into a critical workflow.
  • A Tier 1 tool selection was made without assessing the company's needs at 2x current scale.
  • No classification exists for your current software portfolio. All tools are governed the same way regardless of criticality.

Quick Win

  • List three tools you use.
  • Classify each tool: Tier 1 (core infrastructure), Tier 2 (workflow), and Tier 3 (point solution).
  • Different tiers require different evaluation criteria — confirm you are applying the standard that matches each tool's actual stakes.

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