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Buy vs Build Decision One-Pager

Weigh buying against building, with cost and time. Tech leads use it to get a decision.

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What’s on It

  • Option comparisonThe Three Options, Same Five Tests
  • PhasesHow We Get There
  • Big numberThe Saving
  • Ranked bar chartThree-Year Cost
  • Key pointsWhat Would Change This

Sample One-Pager. Company and figures are made up.

Warehouse Software: Buy or Build
Recommendation for the operations committee
The Three Options, Same Five Tests
Buy Kestrel
Build in-house
Extend incumbent
Cost over three years
$1.24M
$2.10M
$1.87M
Live in the first depot
11 weeks
14 months
7 months
Cross-border stock moves
yes
yes
no
Runs without our team
yes
no
partial
Exit inside 12 months
yes
no
no
How We Get There
01
Contract
Legal review, two weeks
Exit clause at 12 months
Price fixed for three years
02
Pilot depot
Rotterdam, 11 weeks
Stock counts run in parallel
Go / no-go at week 9
03
Cutover
Four depots, one weekend
Incumbent runs one month behind
Old contract lapses in June
The Saving
$860k
Cheaper than building
Over three years, at the same depot count.
Three-Year Cost
Buy Kestrel
$1.24M
Extend incumbent
$1.87M
Build in-house
$2.1M
What Would Change This
Kestrel repricing above $1.5M at renewal.
Cross-border volume falling below 15% of moves.
Two senior platform engineers freed before June.

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