T-Minus: the implementation methodology

How a customer is taken from signature to a running ledger: a go-live date fixed on day one and counted down from T-27, scope that flexes into T-Plus waves, audited balances rather than migrated history, and one real business day rehearsed as the only go / no-go.

9courses

6diagrams

45questions

2.5hours

Start here T-Minus practitioner exam

T-Minus is run by people, not screens, so these courses are read, drawn and checked. They follow Calderwood Group — the customer from the deployment programme — through its first wave, and each links to its guide on the help site. Where the method meets the deployment guide or the service contract, the course says how they fit.

The method

Why the date is fixed, how the clock runs, and who decides what.

Method The inversion: fixed date, flexible scope Why T-Minus fixes the go-live date and flexes scope, the four phases it removes, the five rules, and what the customer measures instead of percent-complete. 12 minutes · 5 questionsOpen Method The countdown: T-27 to T+30 Pre-flight, the five stages of the 27-working-day clock with their exit criteria and artifacts, the gates, the six workstreams, and waves. 18 minutes · 5 questionsOpen Method Mission control: who does what The two named owners and the crew, the RACI across the countdown, the 15-minute standup, the Fit Ledger, scope triage and the countdown board. 18 minutes · 5 questionsOpen

Configure and migrate

Configuring in the open, and staging and proving the migration.

Build Configure in the open The daily configuration loop, the seven configuration days, ASK as an accelerator, configure-never-code patterns, and integrations inside the countdown. 16 minutes · 5 questionsOpen Build Staging the migration: as-of, period, archive Rule 4 and the three migration scopes, what an as-of load contains, the three levels of period migration, choosing per object, and the load sequence. 18 minutes · 5 questionsOpen Build Mock loads, reconciliation and the cutover runbook The six-step cockpit flow, M1, M2 and the dry run with their thresholds, three levels of reconciliation, extraction by source system, and the T-0 runbook. 18 minutes · 5 questionsOpen

Prove, go live and grow

The rehearsal, adoption and change, T-0, hypercare and T-Plus.

Go-live Testing and the rehearsal Six test layers, segregation of duties, designing and running a real business day, the go / no-go criteria, and defect triage. 18 minutes · 5 questionsOpen Go-live Adoption and change on the countdown Coaching in the flow, the adoption journey per user, role readiness, see it / do it / own it, change impact, stakeholders, communications and resistance. 15 minutes · 5 questionsOpen Go-live Go-live, hypercare and T-Plus T-0 for real, hypercare from daily to absorbed, the exit on evidence, T-Plus waves, the artifact catalogue and the Project Plans workbook. 15 minutes · 5 questionsOpen

Check the whole programme

Exam T-Minus practitioner exam Two questions from every course. Pass at 80%. 18 questionsOpen

What is built, and who owns which task under the contract: Deploying TRANXACT

Source: T-MINUS, the TRANXACT Implementation Methodology. It describes itself as a representative illustration; values marked proposed are defaults to confirm per engagement, and the contract prevails. The Project Plans and Artifact Toolkit workbooks it names are issued by your TRANXACT team.