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Every organization says its pipeline is a priority and most can’t say how deep it actually is. Our research on 2 million assessments shows the problem usually isn’t development, it’s that the wrong people were identified in the first place.
▸Definition
A leadership pipeline is an organization's supply of people ready to take on larger leadership roles, at every level. A strong pipeline means named, assessed, actively developing candidates for critical roles — not a list of names on a succession chart.
Succession planning identifies who would fill specific roles. A pipeline is the broader capability that makes succession planning possible: a continuously developing population at every level, so the slate has real options rather than the least-bad one. Organizations frequently have the second without the first — a documented succession plan resting on candidates nobody has developed or measured.
The distinction has a practical consequence. Succession planning is an annual exercise; a pipeline is a standing capability. If your pipeline work happens in the four weeks before the talent review, you have succession planning.
Our research on the mechanics of filling a pipeline: Filling the Leadership Pipeline
And on why the timing of development determines pipeline depth: Leadership Development: Are You Starting Too Late?
Organizations invest in developing identified talent without checking whether they identified the right people. When HiPo lists rely on visibility and tenure, development dollars miss overlooked talent.
What makes someone excellent in their current role may not prepare them for the next level. “Who’s ready?” too often becomes “Who’s best right now?”
Low trust shows up as slower decisions and information that stops flowing upward. By the time it reaches turnover data, it’s been eroding for a year.
When leadership capacity is measured rather than nominated, the population of viable candidates is consistently larger — and different — than the list produced by senior leaders’ impressions. That’s the cheapest available way to deepen a pipeline: measure the people you already employ.
Since extraordinary leaders are defined by a handful of profound strengths rather than the absence of weakness, “ready” doesn’t mean “no gaps.” It means possessing strengths that matter at the next level with no fatal flaw present. Slates built on absence-of-weakness reliably promote the safe, unremarkable candidate.
Also relevant, and often the missing organizational argument: Leadership Development — A Strategic Imperative for Future-Ready Organizations
Based on a study of over 2 million assessments.
Six steps, in the order that actually works.

Ask how each name on the HiPo list got there. If the answer is proximity, tenure or current performance, the list is the problem and no amount of program spend will fix the pipeline.

Multi-rater data on the people who aren't on the list is where pipeline depth actually comes from. This is the single highest-yield move available and most organizations have never made it.

Two candidates with identical profiles convert development at very different rates. Willingness to seek and act on feedback is measurable in advance and predicts who will actually move.

Develop for the next role while the person is still in the current one; pre-promotion, when it's cheap and low-risk. This is the structural fix for a thin bench, and it's a budgeting decision more than a program design one.

"Ready in 2 years" is a placeholder. "Ready when they demonstrate these three behaviors at this level" is a plan, and it tells the candidate what to work on.

Pipelines decay silently. People plateau, leave, or become ready without anyone noticing. Reassessment keeps the slate honest.
Five practices that separate a succession plan that works from a document that exists:
Worth reading alongside: Global Leadership Development
Knowing the three elements is one thing; knowing where your leaders stand on each is another. That’s what these two experiences do.
Strengths-based development for people already leading, and for candidates being prepared one level early.
For deepening readiness at the top of the pipeline.
Development for the non-management population, where pipeline depth is actually created. Surfaces capacity the HiPo list missed.
For widening the base of the pipeline.
Multi-rater data on current leaders and candidates, including the derailing-flaw check, so readiness is evidence-based.
Start here if your HiPo list has never been validated.
Succession planning identifies who would fill specific roles. A pipeline is the standing capability that gives succession planning real options — a continuously developing population at every level. Many organizations have a plan without a pipeline.
Multiple candidates per critical role, assessment data rather than nomination alone, an active development plan attached to every named successor, transparency with candidates in most cases, and reviewing the process against whether internal candidates actually filled roles.
With measured data on the behaviors that differentiate effective leaders, plus coachability, plus asked aspiration. Current-role performance is the most available signal and a poor predictor of performance one level up.
At least two viable candidates for each critical role, with no individual named on more than two slates. If the same people appear everywhere, the pipeline is narrower than the document suggests.
Before promotion. Pre-promotion development is cheaper and more effective than post-promotion remediation, and the delay is the most common structural cause of a thin bench.
By the proportion of critical roles with two or more assessed, actively developing internal candidates — not by the number of names on a chart. Assessment data is what makes the number meaningful.
A short conversation is enough for us to recommend where to start.