Business challenges
01
The system is too critical to replace in one go
The legacy CRM holds 10 years of customer history, complex configurations, and integrations that are not documented. Every previous modernisation proposal was killed by risk concerns before it started.
02
Customisations that nobody understands anymore
Three years of reactive configuration changes. 200 custom fields. 50 active automations. Integrations built by developers who left years ago. Modernisation appears impossible without starting over.
03
Business cannot absorb a big-bang migration
A full replacement requires months of parallel running and a hard cutover date. The business has neither the risk appetite nor the operational capacity to sustain that disruption.
04
Budget requires proof of value before full commitment
Modernisation is a multi-year investment. The board will not approve the full programme based on a slide deck. They need to see measurable business value before committing to subsequent phases.
What is included
Full technical documentation of the legacy system -- all objects, fields, customisations, integrations, business processes it supports, and undocumented dependencies. The foundation every modernisation strategy must start from.
Deliverables
How it works
Legacy system audit
Document every object, customisation, integration, and business process in the legacy system. This often reveals configuration that everyone assumed existed but was never documented.
Modernisation strategy
Design the phased approach with business value at each stage, clear decision points, and rollback options throughout the programme.
Phase 1 delivery
Deliver the highest-value, lowest-risk phase first -- typically within 8 to 12 weeks -- to demonstrate the approach and build organisational confidence.
Historical data migration
Migrate data in phases with full reconciliation at each stage. Nothing archived or discarded without explicit approval.
Subsequent phases
Continue phased delivery until the legacy system is fully decommissioned or the agreed programme scope is complete.
Success stories
We had been attempting to modernise our legacy CRM for 5 years. Three previous attempts had failed in the planning phase. Celumai delivered the first phase in 11 weeks without a single day of business disruption. The programme has continued successfully from that foundation.
The phased approach allowed us to get board approval one phase at a time -- no multi-million commitment upfront. Each phase demonstrated measurable value before we requested the next approval. That structure changed everything about how we could govern the investment.
Healthcare
180% increase in marketing-influenced pipeline
B2B Healthcare Company
Professional Services
300% increase in qualified inbound
CRM Consultancy (60 staff)
Platforms we use for this service
Free resource
Phased modernisation methodology, current state assessment template, and value realisation framework for legacy CRM transformation programmes.
From our team
FAQ
Ready to start?
We respond within 1 business day with an honest assessment -- no commitment required.
Client results
