Danielle Beram

Case study · GameStop · Denver district · 2021 · 15 stores

Manager coaching: measure the behavior in the room

Make coaching quality visible in business performance.

Problem
Coaching and corrective actions were happening, but district performance was not improving. Warranty attachment was 18% against a 30% expectation, membership was 12% against an 18% expectation, and turnover was high.
Intervention
A seven-criterion quality standard, applied by observing and scoring the conversation itself before and after.
Result
District warranty attachment improved 18% → 29% and membership 12% → 21% during the six-month period. Observed coaching quality improved 54% → 87%, while corrective actions fell 25 → 19 across matched six-month periods.

Overview

What this was

The district already had coaching activity and corrective actions. I added a consistent quality standard, observed the conversations themselves, coached managers against what the observations showed, and tracked whether stronger coaching was accompanied by movement in the business outcomes managers were accountable for.

  • Defined the coaching-quality standard and the observation rubric
  • Observed and scored coaching conversations before and after the intervention
  • Coached managers individually against what the observations showed
  • Tracked warranty, membership, and corrective-action movement across the six-month measurement period

The system

Diagnosis, build, and how it ran

The constraint

Coaching and corrective actions were already happening, but the district was still missing the business outcomes they were supposed to improve. Warranty attachment was 18% against a 30% expectation, membership was 12% against an 18% expectation, and turnover was high.

I made coaching quality observable with a seven-criterion standard, scored the conversation itself, and coached managers against the gaps the observations revealed.

The standard

The diagnostic sequence

Seven criteria, scored 1 to 4 during live observation, role-play, and follow-up review. Select one to see what it requires.

Diagnose before deciding whether the answer is teaching, accountability, or a change to the work environment.

The quality bar

A conversation met the standard at 21 of 28 points or higher, with every core criterion scoring at least 2. The core criteria were diagnosis, evidence, behavior change, and follow-up.

What diagnosis changes: one observed example

A store manager believed his assistant had an accountability problem: 7 of 18 tracked priority tasks late or incomplete over three weeks, handoffs missing about five items a week. He was preparing corrective action.

He opened with the pattern and asked what happens when priorities change mid-shift. New asks were arriving verbally with no clear signal about which existing priority they replaced. The diagnosis pointed to environment and clarity, specifically how changing priorities were communicated.

The agreed change was three posted shift priorities with named owners, an explicit statement of what a new request replaces, and a five-minute end-of-shift handoff. At three weeks: on-time completion 61% → 91%, missed handoff items five a week → one. The manager resolved the issue through the clarity changes.

The published sample uses fictional participants and data. The example shows why diagnosis comes before the intervention: the same symptom can point to different fixes.

Measure

Program-level movement

  • District warranty attachment

    18%29%+11 pts

    District KPI during the six-month measurement period. Expectation: 30%.

  • District membership

    12%21%+9 pts

    District KPI during the six-month measurement period. Expectation: 18%.

  • Observed conversations meeting the standard

    54%87%+33 pts

    20 of 37 scored before · 40 of 46 after, same rubric, same standard.

  • Performance-related corrective actions

    25196 fewer

    Matched six-month periods.

The coaching conversation is the behavioral unit of measure. Warranty, membership, and corrective actions are district-level operating outcomes tracked across the same six-month period.

What carried forward

  • Skill / will / environment diagnosis became required before any new performance corrective action
  • Managers self-scored their next conversations before district review
  • The diagnostic and rubric were later adopted as a regional standard for performance coaching

Teaching better conversations was the surface goal. Underneath it, the real design target: make high-quality coaching observable, repeatable, and measurable.

Measurement

What changed

  • 18% → 29%

    District warranty attachment over six months · expectation 30%

  • 12% → 21%

    District membership over six months · expectation 18%

  • 54% → 87%

    Observed conversations meeting the coaching-quality standard

  • 25 → 19

    Performance-related corrective actions, matched six-month periods

District warranty attachment

18%29%Baseline 18%, Six months 29%

BaselineSix months

District expectation: 30%.

District membership

12%21%Baseline 12%, Six months 21%

BaselineSix months

District expectation: 18%.

Coaching conversations meeting the standard

54%87%Before 54%, After 87%

BeforeAfter

20 of 37 observed conversations before · 40 of 46 after, against the same rubric.

Formal performance-related corrective actions

2519Prior period 25, Matched period 19

Prior periodMatched period

Matched six-month periods.

Evidence

Artifacts for this case

Supplied samples are public-safe and sanitized.

  • Coach to Performance rubric and scored example

    The seven criteria, the quality standard, a completed scored observation with coach interpretation, follow-up evidence, and the program-level measurement design.

    Format: PDF · fictional participants and data

    Recreated sampleView the full rubric