Succession Planning

Succession planning tools fall into three categories: visual frameworks like the 9-box grid, software platforms that track successors and readiness, and assessment instruments that measure the people being considered. Most buying guides cover the first two and omit the third, which is where the weakest data in the whole process usually sits.

What Are Succession Planning Tools?

The categories serve different functions and are frequently confused. A framework gives a leadership team a shared structure for a conversation. Software stores the output and produces a board-ready report. Neither generates information about a person; they organize and store it.

That distinction matters because a succession plan is only as good as the judgments inside it. A polished platform full of subjective ratings is a well-formatted guess.

The Three Categories of Succession Planning Tool

Most organizations already have the first two. The third is the one that determines whether the other two are working with evidence or with impressions.

The 9-Box Grid and Its Potential Problem

Ask where the performance rating comes from and you will get review cycles, goal attainment, and output data. Ask where the potential rating comes from and you will usually get a manager's judgment formed over a handful of meetings. That judgment is not worthless, but it carries known problems. It rewards visibility over capability, so the person who presents well in the room outranks the person doing harder work quietly. It rewards similarity, because managers recognize potential most easily in people who operate like they do. And it is unfalsifiable, since nobody revisits the box a person was placed in three years ago to check whether it was right.

Making the Potential Axis Objective

12 Driving Forces addresses the question most often missed entirely, which is whether a person actually wants the next role rather than whether they could hold it. A capable manager who is driven by expertise and craft may be a poor bet for a role that is mostly stakeholder management, and no performance review will surface that. Acumen measures judgment across three dimensions: intrinsic, extrinsic, and systemic, or how much weight a person gives to people, tasks, and systems when deciding. EQ measures self-regulation and empathy, which scale in importance with the seniority of the role. DNA reports 25 personal skills by development level, turning "not ready yet" into a specific list. DISC covers behavioral style. Combining them in a multi-science report is what converts a box on a grid into a development plan.

Readiness Is Not the Same as Potential

A person can be high potential and eighteen months from ready. Another can be ready now for the role directly above them and unlikely to go further, which is not a failing but genuinely useful information. Recording a single blended rating loses both facts. The practical version is to record readiness as a timescale, ready now, ready in one to two years, or longer, alongside the specific gaps that define it. That format survives a leadership change, because the reasoning is written down rather than held in the head of whoever ran the last review.

Promotion Decisions Are Selection Decisions

Succession content almost universally skips this, which is odd given that succession planning is largely about who gets promoted. The obligations sit with the employer rather than the assessment vendor, and they include demonstrating that the procedure is job-related and monitoring whether it produces adverse impact across groups. The practical implications are the same as in hiring and selection. Build a documented benchmark for the target role before assessing anyone. Administer consistently to everyone at the same stage. Use assessment as one input alongside performance history and structured discussion rather than as a gate. And track selection rates by group, because a bench that quietly narrows over three cycles is the kind of pattern that only shows up if someone is looking. The standard itself is at the Uniform Guidelines on Employee Selection Procedures, with employer obligations summarized in the EEOC's guidance on employment tests and selection procedures. TTI publishes its validation approach on the TTI compliance page.

What Succession Assessment Cannot Do

This constrains how the data is used and, handled properly, improves the process. Comparing each candidate to the requirements of the role produces a specific gap list per person. Comparing candidates to each other produces a ranking that feels decisive and rests on a comparison the instrument was not built to support. The second limit is that no assessment establishes that someone will succeed in a role they have not held. What it establishes is what they bring to it and where the gaps are, which is the input to a development plan rather than a forecast. Development work sits in leadership development and team dynamics. Practitioners who want to run this process with their own clients can do so through TTI's certification programs, and supporting research is published at the TTI research portal. The professional standard for assessment practice is maintained by the Society for Industrial and Organizational Psychology.

Succession Planning Tool FAQs

What are succession planning tools?

Succession planning tools fall into three categories: visual frameworks such as the 9-box grid and talent review templates, software platforms that track successors and readiness dates, and assessment instruments that measure the candidates themselves. Frameworks and software organize and store information; only assessments generate consistent data about the people being considered.

Why is the 9-box grid criticized?

Because one of its two axes is weak. Performance ratings draw on review cycles, goals, and measurable output. Potential ratings usually come from a manager's impression, which tends to reward visibility over capability, favors people who operate like the assessor, and is rarely revisited to check whether it was accurate. The grid itself is a sound structure; the problem is the quality of the data placed into it.

How do you measure an employee's potential objectively?

Break potential into components that can each be measured. Whether the person is motivated by what the next role actually offers, how they exercise judgment across people, tasks, and systems, how they regulate themselves under pressure, and which of the role's required skills are already developed. Each of those is measurable with a structured instrument, which produces a specific gap list rather than a single subjective rating.

Can assessments be used to decide who gets promoted?

Within limits. Under the Uniform Guidelines on Employee Selection Procedures at 29 CFR Part 1607, promotion decisions are selection decisions, so the employer carries the obligation to show job-relatedness and monitor adverse impact. Assessment should be one input alongside performance history and structured discussion, applied consistently, and built on a documented benchmark for the target role rather than used as a standalone gate.

What is the difference between readiness and potential?

Potential describes how far someone could eventually progress; readiness describes whether they could step into a specific role now. Someone can be high potential and eighteen months from ready, and someone else can be ready for the next role but unlikely to go beyond it. Recording them as one blended score loses both facts. Recording readiness as a timescale with the specific gaps attached is far more durable.