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Why Architecture Matters

Build a concise argument for why enterprise architecture exists and what happens when it is absent, so learners can articulate value to sceptical stakeholders.

PreliminaryDerived from TOGAF

Why architecture matters: the same four outcomes, with it and without

Four outcomes a sponsor cares about, read as columns: cost, delivery speed, risk and change. The upper state is each outcome with enterprise architecture in place; the lower state is the failure mode without it.

The case for architecture is not abstract. Shared platforms cut duplicated spend, reusable blocks speed delivery, a governed portfolio contains risk, and an enterprise roadmap keeps change aligned to the commitments that fund it.

Why architecture matters: the same four outcomes, with it and without Four outcomes read as columns, left to right: Cost, Delivery speed, Risk and Change, from the Why Architecture Matters sample for a London distribution network. Each column stacks two states. The upper accent panel is the outcome with enterprise architecture in place: shared platforms cut duplicated spend, reusable blocks land capability in weeks, a governed portfolio is one source of truth, and a roadmap ties spend to RIIO-ED2. The lower red panel is the failure mode without it: each team buys its own tooling, long cycles built from scratch, shadow IT raises exposure, and silos never reconcile. A legend names the two states, and Change is marked in red as where the absence bites hardest. With enterprise architectureWithout it (the failure mode) Cost01CostWith architectureShared platforms cutduplicated spendWithout itEach team buysits own tooling Delivery speed02Delivery speedWith architectureReusable blocks landcapability in weeksWithout itLong cycles, builtfrom scratch Risk03RiskWith architectureGoverned portfolio,one source of truthWithout itShadow IT raisesregulatory exposure Change04ChangeWith architectureRoadmap ties spendto RIIO-ED2Without itLocal priorities win,silos never reconcile Change is where it bites.Without a shared roadmap, local priorities win and departmental plans never reconcile against the price controlthat funds them.