HCS treats a team as a Human Cooperation System: a living system of people, expectations, and agreements. Instead of starting from process or tooling, HCS starts from needs and conditions:

• Can people speak honestly without being punished?
• Do they share a realistic picture of constraints and trade-offs?
• Is there clarity about what “good cooperation” looks like here?

The model provides a structured way to diagnose where cooperation is breaking down and to design better conditions and practices.

3SF is built for client–vendor software delivery, where product goals, contracts, and team reality often drift.

It focuses on three core relationships:

• Engagement – how client and vendor start working together.
• Delivery – how teams actually build and release.
• Value – how outcomes from the product loop back to decisions.

The framework helps you see where misunderstandings, misaligned incentives, or missing practices are likely to create problems – long before the project is “in trouble”.