Diagnose & Map method guide
Competence Defensibility Scoring
Competence Defensibility Scoring tests value, rarity, imitation difficulty and organisational support.
Beginner-friendly guide · 4 min read
What Competence Defensibility Scoring does
Competence Defensibility Scoring tests value, rarity, imitation difficulty and organisational support.
VRIO tests whether a resource or competence can contribute to competitive advantage. The letters ask whether it is valuable, rare, difficult to imitate and supported by the organisation.
The assessment must be comparative and evidence-led. A capability can be impressive but common, rare but irrelevant, or valuable but poorly organised. Each condition changes the strategic implication.
The tool applies resource-based strategy logic associated with Barney. A resource or competence contributes to sustained advantage only when the relevant conditions and organisational support are evidenced.[1][2]
A “no” at any stage changes the strategic conclusion and the action required.
- 1Valuable?→
- 2Rare?→
- 3Hard to imitate?→
- 4Organised?→
- 5Strategic implication
InnovationFlow explanatory schematic, synthesised from the method sources[1][2].
Understand the method
The parts in plain language
Imitation difficulty
Assess the time, cost and uncertainty competitors face when trying to reproduce the competence. History, relationships, causal ambiguity and complex routines can matter.[1][2]
Illustrative example
A decade of field-failure data and trusted customer access may be harder to copy than the algorithm alone.
Organisation
Advantage requires structures, incentives, processes and leadership that allow the resource to be used. An isolated expert does not automatically create an organisational competence.[1][2]
Illustrative example
Specialist knowledge creates little value if sales, delivery and product teams cannot access or apply it.
When to use it
- After important capabilities or competences have been identified.
- When investment choices depend on whether an internal strength is truly defensible.
A practical workflow
- 1
Select a clearly defined competence and relevant competitors.
- 2
Assess value, rarity, imitation difficulty and organisational support.
- 3
Record evidence and challenge optimistic internal assumptions.
- 4
Translate the result into protect, invest, partner, monitor or deprioritise choices.
Fictional worked example
Example: installed-base diagnostic knowledge
This example is illustrative rather than a reported case. A manufacturer assesses whether its service knowledge is defensible.
Observation:The knowledge shortens fault diagnosis and reduces downtime.
Implication:It directly supports a valued customer outcome.
Observation:Competitors lack the same historical data and service relationships.
Implication:The combination may be difficult to reproduce quickly.
Observation:Knowledge remains in local spreadsheets and experts’ memories.
Implication:Invest in capture and reuse before claiming durable advantage.
From analysis to decision
How to interpret the result
- 1Record evidence and relevant competitors for each test.
- 2Reassess over time because rarity and imitation barriers change.
- 3Choose protect, invest, partner or deprioritise actions from the weakest condition.
The interpretation guidance is an InnovationFlow synthesis of[1][2].
What a useful output looks like
Common pitfalls
- Scores without comparative evidence create false confidence.
- Rarity today does not guarantee rarity over the roadmap horizon.
References and method basis
- [1]Barney, J. (1991). Firm Resources and Sustained Competitive Advantage. Journal of Management, 17(1), 99-120. Source ↗Peer-reviewed research
- [2]Prahalad, C.K. and Hamel, G. (1990). The Core Competence of the Corporation. Harvard Business Review, 68(3), 79-91. Source ↗Original method source
This guide synthesises the named sources into practical questions for strategy and innovation work. It does not claim that using a tool by itself produces a successful decision.