Organise: Structure, Span of Control and the Middle Layer

All courses / AI Leader / Module 2 / Chapter 9

Learning objectives

After the lesson the participant can:

Explain what spans and layers allocate and why span is a design variable.
Summarise what the evidence on delayering and flat experiments does and does not establish.
Classify a middle manager's tasks into those AI unbundles and those that stay with the manager.
Draft a span-and-layer record that can be shared with employee representatives from the start.

Key concepts

Span of control: The number of people reporting directly to one manager. With n direct reports there are n(n-1)/2 pairs whose work may need reconciling: 36 at a span of nine, 378 at Nordvik's median of 28. A wider span works only where few pairs interact or something else carries the coordination.
Unbundling: AI separates the middle manager's tasks whose inputs are text and records, namely status gathering, reporting drafts, scheduling proposals and first-line answers, from tasks whose inputs are a relationship: coaching, judgement outside the rules, representation and conflict.
Apprenticeship function of layers: Layers make the next generation of leaders: at each rung a person does a slightly larger version of the work under someone who has done it. Removing a layer therefore has a cost that appears later and elsewhere than the saving.
Flattening and control at the top: Rajan and Wulf found flatter hierarchies in large American firms before generative AI; Wulf later argued that flattened firms typically show more control and decision-making at the top. Delegation downward is not an automatic result of removing a layer.
Span-and-layer record: The SPN record states the structure before and after a change, the tasks unbundled, what each moves to, the evidence, the limits that bound the change and the date on which the result is checked, with a stop condition for reverting.

Interactive exercises

Do them here and get feedback at once. Choose a card and then where it belongs, or drag it.

Interactive exercise 1 · Sort

How far each task may be delegated

Sort the middle manager's tasks and decisions by the highest level the chapter's table recommends for each.

Interactive exercise 2 · Scenario

A layer proposed for removal

Apply the chapter's conclusions on delayering to a proposal on the director's table.

Teaching plan

15 min	Lecture on what structure is for: attention, expertise and agreement; the pair arithmetic; and what the studies of manager quality found about retention and learning.
15 min	The teacher reviews the delayering evidence and the flat experiments of Valve, Google and Zappos, stating for each what the source says and that none involves AI doing the coordinating.
15 min	Participants take the bundle of a middle manager's tasks and sort each task into unbundled by AI, with the recommended level, or stays human.
35 min	Exercise: produce a span-and-layer record for a proposed change.
10 min	Quiz and discussion of what the record offers employee representatives under Directive 2002/14/EC.

Discussion

Nordvik saved 31 posts and never measured what the posts did. If you had to describe what one layer in your organisation does besides routing, how would you find out?
Jana Petersen's span has two parts, people and agents, and the record counts them separately. Why does the chapter insist on that separation, and what does each part need from her?
The claim that AI makes wider spans safe is labelled speculation. What evidence from your own organisation would you want before widening one manager's span?

Written exercise

Exercise · 35 minutes

A span-and-layer record before a change

Take a proposed or imagined change to spans or layers in your own organisation, or Mikael Strand's Strandvik home-care unit at Nordvik Region with about 35 staff. Write a span-and-layer record modelled on SPN-NR-2029-01. State the decision holder and the review owner; the structure before, with layers, managers and median span; how the baseline was measured, for example a voluntary time diary agreed with the representatives; each task to be unbundled, what it moves to and at which level; the ceiling on spans; the floor on coaching time; the first rung kept for junior leaders; the review date; and the stop condition under which the structure reverts. Check the four Level 4 prohibitions.

Deliverable: A span-and-layer record of one to two pages with baseline, task moves, span ceiling, coaching floor, review date and stop condition.

Your work

Self-test

Choose an answer to see whether it is right, or open the answer below each question.

What design rule does the chapter draw from the flat experiments at Valve, Google and Zappos?
Show the answer
C. A layer is removed by moving its functions, one at a time and in writing, not by deleting the posts
Each experiment replaced the functions of the layer with something explicit or discovered the cost of not doing so. None involves AI coordinating, so none shows that AI makes flatter structures safe.
Which of these tasks does the chapter place among those that stay human?
Show the answer
A. Representation of the team upward and sideways
Coaching, judgement in cases outside the rules, representation and conflict depend on a relationship. Status gathering, reporting drafts, scheduling proposals and first-line answers have text and records as inputs and can be unbundled.
What is the highest level the chapter recommends for the decision on which named post-holders are affected by a structural change?
Show the answer
D. Not delegated, under the Level 4 prohibition on a named person's employment
The decision to change spans or layers is held at Level 0 Advisory. The decision on which named post-holders are affected is not delegated at all, because it is a decision about a named person's employment.