Featured implementation case · Strategy operationalisation
Making a complex platform migration governable.
How GC brought integration, delivery discipline and executive visibility to a major African banking group's migration from fragmented legacy customer-engagement systems to a modern enterprise platform.
Explore the programme system Live programme system
01DevelopBuild
02PrepareReady
03MigrateMove
04DecommissionRetire
GC programme integrationOne control systemRoadmaps · Decisions · Dependencies
Portfolio visibilityConnected
01The client challenge
A bold platform ambition. A fragmented delivery environment.
The bank was undertaking a multi-year journey to modernise how customers and employees connected across chat, voice, video, mail and social media.
The programme combined new capability development, business-unit migration, third-party integration and progressive retirement of the legacy estate. As it scaled, its workstreams, timelines, dependencies and ownership structures became increasingly difficult to govern as one system.
The turning pointA platform migration cannot be governed as a collection of independent projects.
02 / The mandate
Enter the complexity.Create the integration layer.
GC was initially appointed for a six-month Programme Integrator mandate. The requirements were evolving, so the engagement began without a rigid catalogue of predefined deliverables.
GC embedded alongside the programme leadership team to understand the landscape, establish the required programme infrastructure and adapt the intervention as dependencies, priorities and delivery requirements emerged.
Initial mandate6 months→Client extension+6 months
03 / The programme architecture
Turn programme activity into an executable system.
GC established and strengthened the management architecture required to govern the migration portfolio as one connected programme.
Programme foundation
A Programme Management Plan, implementation architecture, governance rhythms, reporting frameworks and programme controls.
Management planGovernanceRAID & controls
Integrated planning
One planning system connecting development, business consumption, migration, dependencies, rollout priority and legacy retirement.
Integrated roadmapsCritical pathsDependencies
Executive decision support
Decision-ready dashboards, cost models, programme narratives and professional reporting for executives, boards and steering committees.
Executive reportingCost modelsBoard narratives
Delivery coordination
Cross-functional alignment across workstreams, solution owners, vendors, business units and the programme-management office.
Rollout priorityWorkstream alignmentAsset control
04 / Connecting the migration lifecycle
From development to safe legacy retirement.
Five capabilities were being developed while eight existing capabilities were being migrated. GC connected both portfolios to the conditions required for safe decommissioning.
01Develop
Build the future capability.
Connect feature development and product roadmaps to the wider programme plan.
02Prepare
Ready the consuming business.
Identify dependencies, business requirements, change, training and adoption needs.
03Migrate
Sequence the transition.
Coordinate rollout priorities, implementation plans and business-unit migration waves.
04Decommission
Retire the legacy estate safely.
Track the conditions and dependencies required before legacy infrastructure can be switched off.
5
+Platform capabilities being developed
8
One integrated roadmap architectureExisting capabilities being migrated
Executive control viewProgramme connected
05 / Making complexity visible
Give leadership one view of what must move next.
GC translated a highly technical and fragmented programme into decision-ready information for executives, boards, steering committees and programme stakeholders.
01
Monthly implementation roadmaps
02
Executive programme-status reports
03
Board, ExCo and steering-committee presentations
04
Capability maturity and migration views
05
Sub-capability cost and deployment models
06
Resource, task and critical-path analysis
07
Risk, issue and dependency reporting
08
A consolidated programme journey and value narrative
06 / Business enablement
A technical migration still requires organisational readiness.
The platform could not create value unless business units were able and willing to consume the new capabilities.
Business-unit deployment
A structured approach for moving from platform availability to coordinated business consumption.
↗Change and training
A practical framework connecting migration activity to the people readiness required for adoption.
↗User communities
Capability forums, communication pathways and intake processes that connected programme teams to business users.
↗GC connected platform delivery to business-unit deployment, change, training, communication and user engagement—without claiming completion of the wider enterprise migration beyond the GC mandate.
07 / Transfer the capability
Leave the programme stronger than we found it.
GC concluded the mandate through a structured transfer of the programme architecture, reporting system and delivery assets to internal ownership.
01
Implementation roadmaps
02
Executive and board reports
03
Cost and resource models
04
Development and integration plans
05
Decommissioning roadmap
06
Change and training framework
07
User-forum architecture
08
Migration plans and programme controls
Structured transfer5Internal solution owners
08 / What changed
From fragmented programme activity to integrated delivery control.
GC did not claim completion of the entire bank-wide migration. The completed result was the programme system that made the portfolio visible, governable and transferable.
One connected programme view
Development, readiness, migration and decommissioning were connected within a single roadmap architecture.
Stronger executive visibility
Leadership received consistent reporting across milestones, costs, risks, dependencies and priorities.
Clearer migration sequencing
Business rollout, capability availability and legacy retirement could be evaluated as one interdependent journey.
Improved programme discipline
Governance processes, templates, reporting rhythms and asset controls strengthened the delivery infrastructure.
Business-deployment readiness
Change, training, communication and user engagement were incorporated into the migration approach.
Transferable internal capability
Programme assets, reporting responsibilities and ownership were formally transferred to internal solution leaders.
01Stabilise
02Integrate
03Govern
04Transfer
GCEmbedded partnership
09 / The GC difference
Stabilise. Integrate.Govern. Transfer.
GC brought more than additional delivery capacity. We entered an evolving environment, engineered the integration layer and remained close enough to make it executable.
Rigorous programme engineering was combined with practical, embedded delivery—strengthening the client's ability to continue the journey without long-term dependence on GC.
When transformation cannot afford fragmentation
Bring structure to the transformation that must move as one.
When multiple workstreams, technologies, stakeholders and business areas must move together, GC engineers the programme system connecting strategic intent to coordinated execution.
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