three plates · three preparation times · three risks
Build, buy, or borrow
Same capability. Three sourcing strategies. Different speed, different culture-fit, different cost, different failure rate. Senior HR doesn\'t default to one — they match the strategy to the strategic moment.
BUILD
cook from scratch
Internal promote
Speed: 12–24 months for senior roles
Culture fit: highest
Cost: lower long-run
Failure rate: ~30%
Right answer when the role is culture-critical and the time horizon allows.
BUY
takeout
External hire
Speed: 3–6 months
Culture fit: integration risk
Cost: $25–50K premium over promote
Failure rate: ~40% (McKinsey)
Right answer when the capability isn\'t in the pipeline at all. Acquihires count too.
BORROW
potluck
Contingent / gig
Speed: weeks
Culture fit: limited integration
Cost: pay-as-you-go
Failure rate: project-bounded
Right answer for burst capacity. Includes contractors, agency, fractional execs, advisors.
the rule the SPHR exam tests
Match the source to the strategic moment.
Mature business → build.
Disruption pivot → buy.
Burst capacity → borrow.
Excessive buy is a symptom
When senior-level external hiring climbs above 30–40% of total senior placements, that\'s a build failure showing up as a buy strategy. The internal pipeline isn\'t producing successors fast enough. The exam reliably tests whether senior HR sees the systemic issue underneath the symptom — the answer is “invest in the build pipeline,” not “keep buying.”
Exam Traps
Build vs buy is a strategic choice, not a default
Promoting internally is build. External hiring is buy. Contingent and gig is borrow. Senior HR matches strategy to capability.
External hires fail at higher rates
McKinsey research: external hires fail at 40% rates vs 30% for internal promotes. Build cycles cost less in failure rate.
Borrow includes contingent, gig, advisory
Independent contractors, agency workers, fractional executives, advisors all are "borrow." Each has different employment law implications.
M&A is also a "buy" strategy
Acquihires for talent are talent strategy, not just financial. Pre-deal HR diligence assesses talent value separately from financial.
Buy reflects build failure
Excessive external hiring at senior levels signals weak internal pipeline. The exam tests whether senior HR sees the systemic issue.
Mix matches strategy
Mature business → build. Disruption pivot → buy. Burst capacity → borrow. The right mix varies with strategic moment.
Develop talent internally. Slowest but most aligned with culture and longest-lasting.
Hire externally. Fastest specific capability but cultural integration risk.
Contingent and gig workers. Burst capacity without long-term commitment.
Senior HR matches preparation to occasion (strategic moment).
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