The Kernel of Good Strategy is the central framework from Richard Rumelt's *Good Strategy Bad Strategy* (2011). Rumelt argues that the overwhelming majority of what passes for strategy is actually bad strategy -- vague aspirations, lists of goals, or motivational slogans disguised as strategy. Good strategy, in contrast, has a recognizable structure: the kernel.
## The Three Elements
### 1. Diagnosis
The diagnosis identifies and explains the nature of the challenge. It simplifies the complexity of reality by identifying the critical aspects of the situation. A good diagnosis does not just describe the situation -- it reframes it in a way that reveals leverage points and suggests a domain of action.
Examples of diagnosis:
- "Our problem is not that we lack resources, but that we're spreading resources across too many fronts" (focus problem)
- "The industry is shifting from product sales to subscription services, and our entire infrastructure assumes one-time purchases" (structural misalignment)
- "Customers don't leave because of price -- they leave because onboarding is so painful they never reach value" (activation problem)
A bad diagnosis is vague ("we need to grow faster"), circular ("our problem is that we're not winning"), or absent entirely.
### 2. Guiding Policy
The guiding policy is an overall approach chosen to cope with or overcome the obstacle identified in the diagnosis. It channels and constrains action in certain directions without specifying exactly what to do. The guiding policy is a decision about what general approach to take.
Characteristics of a good guiding policy:
- It rules out a large range of possible actions (it says "no" to most things)
- It creates advantage by applying strength against weakness
- It provides direction and coherence without micromanaging
- It exploits leverage -- concentrating effort where it will have the most effect
Example: If the diagnosis is "we're spread too thin across too many markets," the guiding policy might be "focus exclusively on the three markets where we have a structural advantage and exit everything else."
### 3. Coherent Actions
Coherent actions are a coordinated set of specific steps designed to carry out the guiding policy. The key word is *coherent* -- the actions must work together, reinforcing each other rather than pulling in different directions.
Coherence means:
- Actions are coordinated, not just a list of independent initiatives
- Resources are concentrated rather than spread evenly
- Trade-offs are accepted -- doing some things means deliberately not doing others
- The actions build on each other to create compounding effects
A strategy with brilliant diagnosis and guiding policy but incoherent actions will fail. Conversely, actions without diagnosis and guiding policy are just activity.
## Bad Strategy
Rumelt identifies four hallmarks of bad strategy:
1. **Fluff**: Using inflated language and buzzwords to create the illusion of strategic thinking ("our strategy is to leverage our synergistic capabilities to create stakeholder value")
2. **Failure to face the challenge**: Skipping the diagnosis entirely and jumping to goals or actions without understanding the problem
3. **Mistaking goals for strategy**: "Our strategy is to grow 20% annually" is a goal, not a strategy. Strategy explains *how* you will achieve the goal.
4. **Bad strategic objectives**: Either too many objectives (diluting focus) or objectives that are impracticable (disconnected from reality)
## The Power of Diagnosis
Rumelt emphasizes that diagnosis is often the most valuable and most neglected element. A powerful diagnosis transforms a confusing situation into a solvable problem. It is an act of judgment and insight, not just analysis. The best strategists are those who can look at a complex, ambiguous situation and identify the one or two critical factors that matter most.
## Relationship to Other Frameworks
The kernel complements other strategy frameworks. Playing to Win provides a cascade for making strategic choices; the kernel provides a structure for ensuring those choices address the actual challenge. The kernel's insistence on diagnosis prevents the common trap of jumping to solutions ("we need to be more innovative!") without understanding the problem.