Why do ecommerce rebuilds fail early?

Ecommerce rebuilds often fail early due to strategic misalignments, ambiguous success metrics, uncontrolled scope creep, and a lack of genuine cross-functional stakeholder buy-in. These foundational issues undermine the project before any code is written, leading to delays and budget overruns.

How can we define clear objectives for a rebuild?

Define objectives using the SMART framework: Specific, Measurable, Achievable, Relevant, and Time-bound. For example, instead of "improve user experience," specify "reduce cart abandonment by 15% within 12 months" or "increase conversion rate by 10% for new customers within six months."

What is scope creep and how do we prevent it?

Scope creep is the uncontrolled expansion of a project's requirements without corresponding adjustments to resources, timeline, or budget. Prevent it by conducting thorough discovery, prioritising features rigorously into 'must-haves' and 'nice-to-haves,' and implementing a strict change control process for any new requests.

How important is stakeholder involvement?

Stakeholder involvement is critical. An ecommerce rebuild affects nearly every part of the business. Active engagement from sales, operations, finance, and customer service ensures all requirements are captured, potential operational impacts are foreseen, and there is internal buy-in for the new platform and associated process changes.

What should be in a robust discovery phase?

A robust discovery phase includes a detailed analysis of current systems, business processes, user journeys, data migration requirements, and technical architecture. It should produce a comprehensive project roadmap, realistic timelines, accurate cost estimates, and identify potential integration and technical challenges early on.

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Issue 042TeardownReplatformingRef 135

Why ecommerce rebuilds fail before anyone writes code

Many ecommerce rebuilds are doomed from the outset by foundational errors in strategy, scope, and stakeholder alignment. Before any code is written, critical preconditions for success must be established.

Andrew Pemberton· Development Director

21 Dec 20255 min readReviewed December 2025

"Many ecommerce rebuilds are doomed before development starts, collapsing under the weight of strategic ambiguity, uncontrolled scope, and a lack of cross-functional alignment."

Written by

Andrew Pemberton

Development Director

19 years at iWeb

LinkedIn →Speak with Andrew about your brief →

Andrew leads the development practice at iWeb and owns the delivery runbooks behind large commerce migrations. He writes about release governance, deployment sequencing, parallel-run strategy, and the engineering decisions that reduce operational risk during complex transformation programmes. Focused on stable delivery, observable systems, and migration approaches that avoid unnecessary disruption to trading.

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