Make-or-buy economics: 90-day implementation playbook

Executive summary

A method for running the first 90 days of a sourcing switch so suppliers are qualified properly and people are treated fairly.

What is inside

What the 90-day playbook covers

The asset walks a program lead through mobilization, contracts, the harness transfer, board first articles, consultation, the machining refocus, and the day-90 review. It includes a milestone plan, an action log, and escalation rules, with a worked synthetic case.

Mobilizing procurement, quality, engineering, and HR
Signing contracts with minimum terms
Awarding and transferring harnesses
Board first articles and a failed result

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Stratenity Advisory Team. (2026). Make-or-buy economics: 90-day implementation playbook. Stratenity Library. https://www.stratenity.com/resources/library/playbooks/make-or-buy-economics-90-day-implementation-playbook

Stratenity Advisory Team. "Make-or-buy economics: 90-day implementation playbook." Stratenity Library, 2026, www.stratenity.com/resources/library/playbooks/make-or-buy-economics-90-day-implementation-playbook.

Stratenity Advisory Team. "Make-or-buy economics: 90-day implementation playbook." Stratenity Library, 2026. https://www.stratenity.com/resources/library/playbooks/make-or-buy-economics-90-day-implementation-playbook.

Stratenity Advisory Team (2026) Make-or-buy economics: 90-day implementation playbook. Stratenity Library. Available at: https://www.stratenity.com/resources/library/playbooks/make-or-buy-economics-90-day-implementation-playbook (Accessed: the date of access).

@misc{stratenity_stxa0177, author = {{Stratenity Advisory Team}}, title = {Make-or-buy economics: 90-day implementation playbook}, year = {2026}, publisher = {Stratenity Library}, howpublished = {\url{https://www.stratenity.com/resources/library/playbooks/make-or-buy-economics-90-day-implementation-playbook}}, note = {Asset ID STX-A0177} }

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Make-or-buy economics: 90-day implementation playbook

What the 90-day playbook covers

This is a taste. The full library goes deeper.

Stratenity is the AI Operating System for Strategic Execution™.

Stratenity is the AI Operating System for Strategic Execution^™.