These duration scenarios are planning assumptions, not approved dates.
Indicative modernisation delivery schedule
These are proposed low, central and high working-day scenarios, not dates, a funded plan or committed staffing. Approval and waiting time can change the actual elapsed duration.
Low scenario: 195 working days along the longest planned dependency chain.
Delivery slice
Relative working days
DSL-001 · Establish the Deployed and Measurable Baseline20 days · Start
DSL-002 · Resolve Data Authority and Rehearse Migration20 days · DSL-001
DSL-003 · Deliver the Read-Only Servicing Path25 days · DSL-001, DSL-002
DSL-004 · Modernize Workforce Identity and User Administration20 days · DSL-001, DSL-003
DSL-005 · Establish Reference Data and Servicing Updates30 days · DSL-002, DSL-003, DSL-004
DSL-006 · Cut Over Payments and Transaction Outcomes35 days · DSL-002, DSL-005
DSL-007 · Migrate Authorization, Fraud, Batch, Reporting, and Recovery45 days · DSL-001, DSL-002, DSL-006
Central scenario: 450 working days along the longest planned dependency chain.
Delivery slice
Relative working days
DSL-001 · Establish the Deployed and Measurable Baseline45 days · Start
DSL-002 · Resolve Data Authority and Rehearse Migration50 days · DSL-001
DSL-003 · Deliver the Read-Only Servicing Path55 days · DSL-001, DSL-002
DSL-004 · Modernize Workforce Identity and User Administration45 days · DSL-001, DSL-003
DSL-005 · Establish Reference Data and Servicing Updates65 days · DSL-002, DSL-003, DSL-004
DSL-006 · Cut Over Payments and Transaction Outcomes80 days · DSL-002, DSL-005
DSL-007 · Migrate Authorization, Fraud, Batch, Reporting, and Recovery110 days · DSL-001, DSL-002, DSL-006
High scenario: 935 working days along the longest planned dependency chain.
Delivery slice
Relative working days
DSL-001 · Establish the Deployed and Measurable Baseline90 days · Start
DSL-002 · Resolve Data Authority and Rehearse Migration110 days · DSL-001
DSL-003 · Deliver the Read-Only Servicing Path105 days · DSL-001, DSL-002
DSL-004 · Modernize Workforce Identity and User Administration90 days · DSL-001, DSL-003
DSL-005 · Establish Reference Data and Servicing Updates130 days · DSL-002, DSL-003, DSL-004
DSL-006 · Cut Over Payments and Transaction Outcomes170 days · DSL-002, DSL-005
DSL-007 · Migrate Authorization, Fraud, Batch, Reporting, and Recovery240 days · DSL-001, DSL-002, DSL-006
Dependencies and review requirements
The sequence includes access to environments, review by customer subject-matter experts, decisions about business behaviour and representative validation. These scenarios should be recalibrated after the first accepted delivery slice.
Harten analysis of AWS Samples CardDemo, a public demonstration application. The retained source content matches AWS revision 59cc6c2fd7ebd7ef7925cad552a01a4b8b6e4d5e. The documents describe source analysis and a proposed modernisation plan, not an implemented migration. No AWS endorsement is implied.
