OB Exam Crash Course: 7S, Culture, and Structure

Simon Carver

Okay, we've got one shot to get the whole OB course into your head before the exam, so let's move fast and hit it the way the examiner will — through the 7S lens, because that's the spine of literally everything in this course.

Lachlan Reed

Right, and that's the first thing to lock in before we go anywhere: every single session maps onto one or more of the 7S elements — Strategy, Structure, Systems, Shared Values, Staffing, Skills, Style. As you study, the question in the back of your mind should always be: which S or Ss does this topic live in?

Simon Carver

Give me the quick map.

Lachlan Reed

Culture is mainly Shared Values, with Style and Staffing in support. Structure is, unsurprisingly, Structure. Teams touch almost everything — Structure, Skills, Shared Values, Style, Staffing. Decision-making is Style and Skills. Social networks are Skills and Structure. Motivation is Systems and Staffing. Leadership is Style. And change management — that's the big one — touches all seven.

Simon Carver

And the Hard versus Soft distinction matters here too.

Lachlan Reed

It does. Strategy, Structure, and Systems are the Hard Ss — directly controllable, visible, easy to copy. Shared Values, Staffing, Skills, and Style are Soft — intangible, but that's exactly why they're the harder-to-copy, more durable source of advantage. Hold onto that, because it's the whole lesson of the Walmart-versus-Costco case.

Simon Carver

Let's do that one now actually, since it anchors Session 1 and 2.

Lachlan Reed

Walmart goes all-in on Hard-S efficiency — cost minimization, tight Systems and Structure, leaning Short-term and Parts. Costco goes the other way — it accepts higher labor costs because it's betting on Staffing and Skills, on employee wellbeing, leaning Whole and Long-term. The exam point isn't "Costco is right" — it's that both alignments can work, depending on which of the fundamental tensions you choose to prioritize.

Simon Carver

Which brings us to the three tensions everything else hangs off of.

Lachlan Reed

Parts versus Whole — that's synergy, the organizational model. Short-term versus Long-term — sustainability, the management model. And Profitability versus Growth — market expansion, the business model. Every Goold and Campbell design criterion you'll see later maps back to one of these three.

Simon Carver

And then the Six Traps — these are the ones examiners love because they sound like common sense until you misapply them.

Lachlan Reed

Tying costs to earnings — obsessing over expense ratios. Customer focus — chasing every whim and losing your core competency. Annual earnings growth — sacrificing long-term health for this year's number. Present value — undervaluing future investment. And then the two opposite traps on the Parts-Whole axis: Autonomy, which is too much decentralization, and Centralization, miscalculating how much you've delegated.

Simon Carver

Okay, culture. Session 2, mostly Shared Values.

Lachlan Reed

The iceberg model is the image to hold onto — the visible tip is artifacts, norms, enacted values, the "walk." The submerged base is attitudes, beliefs, core values — and those override everything else once they're actually tested under pressure.

Simon Carver

Don't mix up espoused and enacted.

Lachlan Reed

Espoused is the talk — the desired end-state you'd put on a poster. Enacted is the walk — what people actually do day to day. Core values are the ones that win when the other two conflict.

Simon Carver

And culture gets maintained how?

Lachlan Reed

ASA — Attraction, Selection, Attrition. Organizations attract people who already share their values, select for fit in hiring, and the people who don't fit eventually leave on their own. It's powerful for commitment — but it's also a structural barrier to diversity, and that trade-off is exam gold.

Simon Carver

Southwest is the culture case to know.

Lachlan Reed

The "Southwest Way" put employees first, reinforced through artifacts and a genuinely distinctive experience. Continental Lite and United Shuttle tried to copy the Hard Ss — the low-cost structure and strategy — while completely ignoring the Soft Ss underneath. They failed. Lesson: you cannot copy culture by copying the visible parts of it.

Simon Carver

Quick one — the Competing Values Framework, the four culture types.

Lachlan Reed

Two axes — Flexible versus Stable, Internal versus External. Flexible-Internal is Clan, "collaborate." Flexible-External is Entrepreneurial, "create." Stable-Internal is Bureaucratic, "control." Stable-External is Market, "compete." And here's the linking fact examiners love — these map straight onto the five structure types: Clan to Team structure, Entrepreneurial to Simple or Network, Bureaucratic to Bureaucratic, Market to Matrix.

Simon Carver

Which takes us into structure properly — Session 3, almost purely the Structure S.

Lachlan Reed

Core vocabulary first. Chain of command — the unbroken line of authority. Span of control — how many people one manager supervises; narrower means fewer direct reports. Unity of command — one boss per employee. Formalization — how much rules and red tape direct behavior.

Simon Carver

And the master spectrum.

Lachlan Reed

Mechanistic versus Organic. Mechanistic is rigid, specialized, centralized, optimized for efficiency. Organic is flexible, decentralized, collaborative, optimized for adaptation. Every one of the five structure types sits somewhere on that spectrum.

Simon Carver

Run through the five types fast.

Lachlan Reed

Bureaucratic — very mechanistic, centralized, high formalization, best at large to very large scale, think government. Matrix — a mix, less centralized, dual reporting, think Procter & Gamble. Team — more organic, less centralized, medium formalization, think consulting firms. Simple — very organic but centralized, only works at small scale, think a mom-and-pop store. Virtual or Network — very organic, relatively efficient despite that, think Nike.

Simon Carver

Matrix has one feature you must be able to state cleanly.

Lachlan Reed

Dual reporting. Straight-line to the business head for day-to-day work, dotted-line to the parent function for career growth. That's literally the definition — if a question asks "what is a matrix structure," that's your one-sentence answer.

Simon Carver

And inside Bureaucratic there are sub-variants.

Lachlan Reed

Functional, Product or Divisional, and Geographical. Functional is efficient but creates silos. Product-divisional has strong market focus but duplicates effort. Geographical has strong local focus but weak overall marketing coherence.

Simon Carver

Goold and Campbell's design criteria — what's the trick to remembering these?

Lachlan Reed

Don't memorize them as a flat list — notice that every single one maps back to one of the three fundamental tensions from Session 1. Competitive advantage and efficiency map to Profitability-Growth. Synergies, specialist distinctiveness, and unit-to-unit links map to Parts-Whole. Employee fit, implementation constraints, and flexibility map to Short-term-Long-term. If you frame your answer that way, you're doing exactly what the examiner wants.

Simon Carver

Last thing on structure — OGSM.

Lachlan Reed

Objectives, Goals, Strategies, Measures. The point is alignment top to bottom — if the junior-most person misses their objective, the CEO literally cannot hit theirs either. And remember: a structure is a configuration of jobs, not people. Define jobs by results and values, not activity lists.

Simon Carver

Okay, teams — Session 4, the broadest S-coverage of any topic.

Lachlan Reed

The definition to know cold: a team is a small number of people with complementary skills, committed to a common purpose, performance goals, and approach, who hold themselves mutually accountable. Essence of a team is common commitment. All teams are groups; not all groups are teams.

Simon Carver

Hill's three effectiveness criteria.

Lachlan Reed

Does the output meet users' standards? Does the experience help members' wellbeing and development? Does it build the team's capacity to work together in future? Three separate tests — and notice none of them is purely about the output.

Simon Carver

Interdependence types — this is a classic sequencing question.

Lachlan Reed

Pooled — everyone works independently, outputs combined at the end. Sequential — assembly-line, one person's output feeds the next. Reciprocal — real-time, iterative adjustment, think a surgical team or a basketball team. Comprehensive — the highest level, continuous brainstorming and joint decisions.

Simon Carver

Tuckman's stages, in order.

Lachlan Reed

Forming, storming, norming, performing, adjourning. Uncertainty, then conflict, then cohesion, then task focus, then wrap-up.

Simon Carver

But Gersick pushes back on that.

Lachlan Reed

Right — Gersick's punctuated equilibrium model says for temporary, deadline-driven teams, activity is low before the midpoint, jumps sharply at the midpoint, and rises again toward the deadline. It directly challenges the assumption that teams develop in a neat linear sequence.

Simon Carver

And conflict types — three flavors, and only one of them is reliably bad.

Lachlan Reed

Task conflict — about goals and content — low to moderate levels are actually good. Process conflict — about how work gets done — low levels are good. Relationship conflict — interpersonal, emotional — almost always bad, full stop.

Simon Carver

MediSys is the team case.

Lachlan Reed

It shows what happens when you ignore that distinction — a lack of reward interdependence and a failure to manage the Manager-Individual-Team triangle let relationship conflict tank performance.

Simon Carver

Session 5, team decision-making — quick hits on biases.

Lachlan Reed

Action bias — preferring to do something over nothing. Default bias — it takes real effort to move someone off the default option. Confirmatory bias — seeking evidence that supports what you already believe and discounting the rest.

Simon Carver

Groupthink is the headline concept here — give me the definition exactly.

Lachlan Reed

A mode of thinking that happens in a deeply involved, cohesive in-group, where the members' need for unanimity overrides their motivation to realistically appraise alternatives. It's a deterioration of mental efficiency, reality testing, and moral judgment under in-group pressure.

Simon Carver

Eight symptoms — this is worth being able to rattle off.

Lachlan Reed

Invulnerability — excessive optimism. Inherent morality — ignoring the ethics of what you're doing. Rationalization — protecting your pet assumptions. Stereotyped views of the opposition — underestimating them. Self-censorship — biting your own tongue. Illusion of unanimity — reading silence as agreement. Peer pressure — questioning dissenters' loyalty. And mind-guards — people who self-appoint to protect the group from inconvenient information.

Simon Carver

Don't confuse groupthink with group polarization.

Lachlan Reed

Polarization is different — it's not about consensus pressure, it's about amplification. A group with a slightly risky lean ends up riskier; a slightly cautious group ends up more cautious. The group exaggerates whatever direction it was already leaning.

Simon Carver

And one more bias that's easy to forget — the common information effect.

Lachlan Reed

Groups spend too much time discussing information everyone already shares, and not enough time on the one useful thing only one person in the room actually knows.

Simon Carver

Session 6, social networks — this one's got the stat everyone remembers wrong.

Lachlan Reed

Granovetter's Strength of Weak Ties. People found jobs twenty percent through formal means — ads, headhunters — and fifty-six percent through personal connections. The twist is that most of those personal connections were weak ties, not close friends — occasional or rare contacts. The lesson: relying only on strong ties means missing out on friends-of-friends, and that's where the real social capital is.

Simon Carver

Human capital versus social capital.

Lachlan Reed

Human capital is what you know — your education, your skills. Social capital is who you know — your network. And within networks, there's a range-versus-density trade-off: range is how diverse your contacts are, density is what fraction of possible ties actually exist. High density builds trust but can box you in.

Simon Carver

Heidi Roizen is the case here.

Lachlan Reed

She's the model network "Broker." And there's a specific detail the guide flags — a surprising number of successful networkers and entrepreneurs are dyslexic, having built strong oral communication and delegation skills out of necessity, which translates into expansive, trust-based social capital.

Simon Carver

Session 7, motivation — biggest topic, so let's be efficient.

Lachlan Reed

Start with the formula. Performance is a function of Ability times Motivation times Opportunity, and Motivation itself is a function of the Person, the Job, and Rewards.

Simon Carver

Intrinsic versus extrinsic, and the crowding-out effect.

Lachlan Reed

Cognitive Evaluation Theory — give someone an extrinsic reward for a task they were already doing because they enjoyed it, and total motivation can actually drop. Intrinsic plus extrinsic ends up less than intrinsic alone. That's the "crowding out" effect, and it's a favorite exam trap because it's counterintuitive.

Simon Carver

Theory X and Theory Y.

Lachlan Reed

X assumes people are naturally averse to work and need control. Y assumes effort is natural and people will self-direct if conditions are right. Classic McGregor.

Simon Carver

The Pygmalion effect.

Lachlan Reed

Managers' expectations of their people become self-fulfilling. Superior managers set high but realistic goals, choose subordinates carefully, and don't give up on them — and the effect is strongest on younger employees specifically.

Simon Carver

Needs theories — four of them, don't let them blur together.

Lachlan Reed

Maslow is the classic ascending hierarchy — physiological, safety, social, esteem, self-actualization. Alderfer's ERG compresses that into Existence, Relatedness, Growth — and the key difference is more than one can be active at once, and frustrating a higher need increases desire for a lower one. McClelland's learned needs are nAch, nPow, nAff — achievement, power, affiliation. And Herzberg's Two-Factor theory says motivators like recognition and the work itself drive satisfaction, while hygiene factors like salary and policy only prevent dissatisfaction — two separate continua, not one scale.

Simon Carver

That last point trips people up constantly.

Lachlan Reed

It does — the instinct is to think salary motivates. In Herzberg's model, salary is hygiene. It stops people being unhappy. It doesn't make them satisfied. Different axis entirely.

Simon Carver

Job Characteristics Model.

Lachlan Reed

Five core characteristics — skill variety, task identity, task significance, autonomy, feedback. They drive better psychological states and performance, moderated by the person's existing skill, their growth need strength, and their satisfaction with context factors.

Simon Carver

Equity theory.

Lachlan Reed

Motivation depends on your input-to-outcome ratio compared to some relevant other — another person, a policy, even your past self. People tend to overestimate their own effort, so perceived inequity shows up more often than you'd expect, and it can hurt productivity, quality, even how long people stay.

Simon Carver

Vroom and Locke — the two process theories.

Lachlan Reed

Vroom's Expectancy Theory: Motivation equals Expectancy — will effort lead to performance — times Instrumentality — will performance lead to reward — times Valence — how much you actually value that reward. Locke's Goal-Setting Theory: specific, difficult goals plus feedback drive higher performance, especially on simple tasks, and how the goal got set matters less than whether the person is committed to it.

Simon Carver

SAS Institute closes out motivation.

Lachlan Reed

Proof that money isn't the only lever — SAS built its whole HR system around Growth and Relatedness needs and sustained high performance without leaning on heavy extrinsic pressure.

Simon Carver

Session 8, leadership — there's a theory timeline here, and the through-line is each theory challenges the last one's "sacred cow."

Lachlan Reed

Trait theory says leaders are born, not made — the Great Man theory. Behavioral theory plots leaders on People versus Task — high-high is Team Leadership, low-low is Impoverished, high-people-low-task is Country Club, low-people-high-task is Authority-Compliance. Situational theory — Fiedler's Contingency Theory — says it depends on Situational Control, which is leader-member relations plus task structure plus position power; high and low control favor Task-Motivated leaders, moderate control favors Relationship-Motivated leaders.

Simon Carver

Transactional versus Transformational — the classic contrast pair.

Lachlan Reed

Transactional leaders are "managers" — appointed, motivate with rewards, focus on shorter-term targets, they cope. Transformational leaders are "leaders" — they emerge, inspire with vision, focus on longer-term goals, they create. And transformational requires personal risk, high emotional style, high energy — none of which transactional strictly needs.

Simon Carver

Charismatic leadership has a specific process sequence.

Lachlan Reed

Vision and articulation, then personal risk and exemplary behavior, then environmental sensitivity, then sensitivity to follower needs, then unconventional behavior. It works best when the task has an ideological component, the environment is stressful or uncertain, and the leader has enough position power to actually "vision."

Simon Carver

Shared, Servant, and Level 5 — the three that challenge the idea of a single leader at all.

Lachlan Reed

Shared leadership — simultaneous, mutual influence, four capabilities: sensemaking, relating, visioning, inventing. Best for high interdependence, high creativity, high complexity tasks. Servant leadership — more a philosophy than a testable theory, all about service over self: listening, empathy, healing, foresight, stewardship, building community. Level 5 — described as a paradox, challenging the idea that leadership develops in a straight line.

Simon Carver

EI competencies — don't confuse the grid with the leadership styles built on it.

Lachlan Reed

The competencies model crosses Self versus Other with Recognition versus Regulation — Self-Awareness, Self-Management, Social Awareness, Relationship Management. The EI Leadership Styles then sit on a People-by-Task grid that mirrors the old Behavioral grid: Affiliative is high-people-low-task, "people come first." Authoritative and Coaching are high-high, "come with me" and "try this." Democratic is the middle ground, "what do you think?" Coercive is low-people-high-task, "do what I tell you." And Pace-Setting sits at the boundary, low on people-orientation, "do as I do, now."

Simon Carver

Type A and Type B personality — quick contrast.

Lachlan Reed

Type A — always rushing, impatient, trying to multitask, can't relax, measures success by quantity, winning is everything. Type B — no time urgency, doesn't need to prove achievements, plays for fun not dominance, can relax without guilt.

Simon Carver

Ricardo Semler is the leadership case.

Lachlan Reed

A vehicle for testing almost every theory above — his early versus later leadership style, and crucially, why the later style actually worked.

Simon Carver

Sessions nine and ten, change management — the big finale, touches all seven Ss.

Lachlan Reed

Start with the principle: change is a process, not an event. The four-stage adoption model — Awareness, Interest, Trial, Adoption. The single most important rule sits at the Interest stage: always explain the Why.

Simon Carver

Why does resistance happen at all?

Lachlan Reed

Because, in the guide's own words, "that's how organizations are designed to be." Resistance shows up at three levels. Organization-level: structural bureaucracy and interdependencies, cultural ossification, and power-and-politics — every change effort is a chance to reshuffle power, and past failures breed cynicism. Group-level: norms and inertia. Individual-level: habit and fear of the unknown.

Simon Carver

Lewin's model, then Kotter's steps mapped onto it.

Lachlan Reed

Lewin: Unfreezing, Movement, Re-freezing — prepare, implement, institutionalize. Kotter's eight steps slot in underneath. Unfreezing covers establish urgency, build a coalition, develop a vision, communicate the vision. Movement covers empower people, generate short-term wins, consolidate improvements. Re-freezing is just step eight — anchor it in the culture.

Simon Carver

The change-type matrix.

Lachlan Reed

Two axes — degree of change, incremental to strategic, and the driver, anticipatory to reactive. Tuning is anticipatory and incremental. Adaptation is reactive and incremental. Re-orientation, or "frame-bending," is anticipatory and strategic. Re-creation, "frame-breaking," is reactive and strategic. The more "red" — the more strategic and reactive — the more active management the change needs.

Simon Carver

Adopter profiles — Rogers' diffusion curve, in the guide's own labels.

Lachlan Reed

Innovators or Market Mavens — high awareness, love experimenting and sharing. Early Adopters or Brokers — well-connected across the firm, spread ideas. Early Majority or Pragmatists — want predictable gains, get the bandwagon rolling. Late Majority or Conservatives — "if it ain't broke," join once there's critical mass. Resistors — never support anyone's initiative but their own, block change at every stage.

Simon Carver

And Ghosn at Nissan closes the course.

Lachlan Reed

It's the stress-test case — does Kotter's eight-step model actually hold up against a real turnaround, what drove the change, and how were the competing tensions balanced along the way.

Simon Carver

Okay — if you remember nothing else walking into that exam—

Lachlan Reed

Identify the relevant S or Ss before you answer anything. Use the comparison tables instead of describing things in the abstract. Name the specific bias, trap, or symptom before you recommend a fix. And don't forget the dual mandate — good OB optimizes both organizational performance and individual development and wellbeing. Never answer as if performance is the only goal.

Simon Carver

That's the whole course. Go get some sleep before tomorrow.