For chief technology officers

The build-versus-buy argument has been had four times, and nobody wrote down why it keeps coming back.

The CTO seat splits differently in every company, which makes generic advice useless. What helps is eight people who have drawn the internal/product line somewhere and can say what it cost them.

01Decisions

What CTOs bring to a table

Three that come up repeatedly. Yours does not have to be on this list — it has to be undecided.

  • Deciding what is genuinely differentiating, and buying the rest without admitting defeat
  • Platform team funding when contract rates exceed your senior salary band
  • Where the CTO/CIO boundary sits, and who owns the argument when it moves

Read what a table produced

02The room

Who you sit with

Format

Cross-functional Table

CTOs and CIOs at organisations where the boundary is genuinely contested.

Cap

Eight seats

Never nine. No direct competitors, and never two people from the same company.

Rule

Chatham House

Never recorded. See the house rules and the trust centre.

All four table formats

Bring the decision you are carrying.

One paragraph. A person reads it within two business days.