Best fit when requirements are relatively stable and budget, schedule, and acceptance need to be explicit.
ARIS Vietnam standardizes scope baselining, acceptance criteria, change requests, and milestone quality gates so that small additions do not quietly accumulate into delay and rework.
This model works best when scope, timing, and acceptance need to be clearly defined from the start.
A good fit when the target scope and review criteria can be baselined early.
When the procurement or approval process requires a firm price and timeline before work begins.
When the delivery requires written acceptance, sign-off, and traceable quality gates at each milestone.
When the engagement is structured around a statement of work and milestone-based payment.
If priorities change often or uncertainty is still high, another model is usually more effective.
We structure the engagement around baseline, build, QA, delivery, and handover according to the agreed contract.
Scope in/out, assumptions, constraints, NFRs, acceptance criteria, acceptance flow, WBS, milestones, reporting, and decision log.
Architecture, screen/API/data design, and implementation across milestones within the agreed scope.
Unit and integration testing, bug triage, and milestone-level quality gates before advancing to the next phase.
Support client-side UAT, produce acceptance records, and manage the formal sign-off process.
Record, assess impact, seek approval, and track all changes to scope after baseline is locked.
Deliver technical docs, runbooks, training material, and operational handover to the run team.
Every change is recorded, impact is shown, and work starts only after approval. Roles are clarified early.
Each CR documents the requested change, the reason, and the business context.
ARIS assesses schedule, budget, and quality impact before the CR is approved, so surprises are minimized.
Approved CRs are executed in the next available sprint or milestone window, with traceability back to the original request.
ARIS and the client agree on roles early: who owns scope decisions, who approves CRs, and who signs off at each milestone.
Even in a fixed scope project, delivery is controlled through milestone-based quality gates.
Agree on scope, acceptance criteria, CR rules, WBS, milestones, risks, and actions.
Run design and development within the agreed scope, managed through sprint or milestone cycles.
Run QA, triage bugs, and confirm the milestone gate before proceeding to the next phase.
Support client UAT, collect sign-off, deliver documentation, and complete operational handover.
Deliverables are organized to make acceptance and handover easier.
Scope in/out, assumptions, constraints, and NFR baseline.
Testable acceptance criteria and acceptance flow.
Architecture, screen, API, data, and permission design aligned to the agreed scope.
Test case results, bug triage records, and milestone quality gate evidence.
Log of all change requests with assessment, approval status, and execution notes.
Technical docs, runbook direction, training material, and handover checklist.
We can shape the contract around project size and delivery style.
For compact change requests with short acceptance cycles.
Easy to explain and approve as a fixed-scope package.
A defined feature set or module with milestone-based delivery and formal acceptance.
Standard milestone and acceptance structure.
Full-scope delivery for complex systems with phased milestones, formal governance, and structured handover.
Formal governance and handover included.
Fixed scope for defined core deliverables, with a T&M buffer for discovered scope or integration complexity.
Best of both models.
Choose the model based on certainty, delivery objective, and how much change is expected.
Best when the objective, requirements, or approach still need to be validated before committing to full scope.
Learn more →Best when requirements shift continuously and you need a long-term team for iteration, planning, and coordination.
Learn more →Best when scope, acceptance criteria, and timeline are relatively clear and formal sign-off is required at each milestone.
Current pageBest for post-production support including incident handling, SLA governance, and incremental improvement.
Learn more →We do not only fix the scope. We also standardize acceptance, transparency, and delivery governance.
Minutes, decision log, issue/risk management, CR process, and quality standards are built in.
Deliverables and QA are designed to align with your acceptance viewpoints from day one, so sign-off is smooth.
Progress, blockers, and CR impact are reported at every milestone so surprises are avoided and decisions are made early.
Yes. We clarify assumptions and scope in/out, and if needed we run a short refinement before locking the baseline.
Acceptance criteria define what "done" means at each milestone — typically covering functional behavior, data accuracy, performance thresholds, and sign-off conditions.
The change goes through a CR process: it is recorded, impact is assessed (schedule, cost, quality), and it is only executed after approval by both sides.
Yes. ARIS can prepare UAT scripts, support the client team through testing, triage bugs, and manage the formal acceptance record.
New requirements are handled as CRs. If the volume is large, ARIS will recommend adjusting the scope, timeline, or both to keep the project on track.
ARIS can propose a fixed scope plan with milestones and CR rules that fits your approval and delivery needs.
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