Want to validate first
PoC / MVP is the right choice to confirm business and technical feasibility, then transition to Dedicated Team or Fixed Scope.
Engagement Models
Choose the right collaboration model for your software project
ARIS Vietnam offers PoC / MVP, dedicated team, fixed-scope delivery, and maintenance support to match your goals, budget, and project stage.
We recommend the most practical delivery model for your current phase and next milestone.
Selected by requirement maturity
Clear change control and alignment
Support from development to operations
Overview
Overview of 4 Engagement Models
This page helps your business understand the differences between 4 engagement models, and how to choose the right approach for your offshore project. Content is organized by requirement clarity, budget approach, start speed, and governance style to support your model selection.
Comparison
Compare the 4 Engagement Models by Objective
The table compares PoC / MVP, Dedicated Team, Fixed-Scope Delivery and Maintenance & SLA by key criteria important when starting a project. Review which model fits your project type, then assess by requirement clarity, budget, start speed and governance.
Want continuous improvement
Dedicated Team is the right choice for medium to long-term projects with continuous features and frequent priority adjustments.
Want clear budget and timeline
Fixed-Scope Delivery is the right choice when requirements and acceptance criteria are clear, with a fixed budget.
Prioritize stable operations
Maintenance & SLA is the right choice for ongoing monitoring, incident response, reporting, and improvement proposals.
Scope of Services
Model Details
Below is a model-by-model summary of characteristics, deliverables, and best-fit cases. After reviewing the comparison table, use this section to evaluate your choice in more detail.
① PoC / MVP Validation
Validate assumptions fast and decide the next phase
A model to quickly validate hypotheses. Suitable when requirements are not fully defined and you need to quickly confirm technical feasibility or direction.
Best-fit cases
- Requirements unclear
- Need feasibility check
- Demo for internal approval
Typical deliverables and scope
- Demo-ready PoC / MVP
- Scope and assumption clarification
- Key risk validation
- Next phase roadmap and rough estimate
② Dedicated Team
Develop continuously while priorities change
A model for continuous development while adjusting priorities. Suitable for medium to long-term projects requiring continuous feature additions and improvements.
Best-fit cases
- Continuous improvement
- Frequent priority changes
- Want dedicated team
Typical deliverables and scope
- Backlog management
- Weekly meetings, meeting minutes, issue / risk management
- DoD and change management
- Velocity management
③ Fixed-Scope Delivery
Deliver with clear scope, timeline, and acceptance
A model to proceed with clear scope, timeline and deliverables. Suitable when requirements are relatively stable and you need clear budget and acceptance management.
Best-fit cases
- Requirements and deadline clear
- Want fixed budget
- Clear acceptance criteria
Typical deliverables and scope
- Requirements baseline clarification
- Change request (CR) management and impact assessment
- Quality gate design for reviews and testing
- Timeline, deliverable, and responsibility clarification
④ Maintenance & SLA
Stabilize operations and improve after release
A model for stable operations and continuous improvement after go-live. Suitable for maintaining system stability and pursuing long-term improvements.
Best-fit cases
- Stable production operations
- Outsource monitoring & incidents
- Continuous improvement
Typical deliverables and scope
- L1–L3 support operation structure
- SLA and monthly reporting
- RCA and incident prevention measures
- Minor improvements and preventive maintenance
Decision Guide
Decision Guide: How to Choose the Right Model
Choose based on project goal, requirement maturity, flexibility needs, and whether operations are included.
Want to validate first
PoC / MVP is the right choice to confirm business and technical feasibility, then transition to Dedicated Team or Fixed Scope.
View detailsWant continuous improvement
Dedicated Team is the right choice for medium to long-term projects with continuous features and frequent priority adjustments.
View detailsWant clear budget and timeline
Fixed-Scope Delivery is the right choice when requirements and acceptance criteria are clear, with a fixed budget.
View detailsPrioritize stable operations
Maintenance & SLA is the right choice for ongoing monitoring, incident response, reporting, and improvement proposals.
View detailsWhy ARIS Vietnam
Why ARIS Vietnam
The model matters, but so does execution. ARIS Vietnam supports alignment, change control, quality, and handover.
Progress management that keeps agreement going
Weekly meetings and issue logs reduce decision waiting and misalignment.
Change management-first operational design
CR and priority management suppress scope creep and rework.
Quality not dependent on individuals
Clear DoD, review standards, and test policies improve quality reproducibility.
Flexible phase transition design
Transition to the most suitable model and structure at each phase.
End-to-end from development to operations
We support from new development through operations to continuous improvement.
Strong response to Japanese-style projects
We prioritize reporting, documentation, quality awareness, and progress visibility.
FAQ
FAQ
We have compiled the questions we receive most often around contract model, delivery approach, and maintenance / operations.
The common approach is to start with PoC / MVP to validate hypotheses, then transition to Dedicated Team or Fixed Scope based on the results.
We manage backlog, clarify priorities, and make change requests visible so that unagreed specifications don't get implemented.
We can provide a rough estimate with stated assumptions along with a short requirement clarification phase.
Yes. We first clarify whether it's a PoC for validation or a production-oriented MVP, then agree on reuse policies.
Yes. We also support phase transition design such as PoC → Dedicated Team or Fixed Scope → Maintenance.
It depends on project scale and decision makers, but PM or BrSE structure is effective for projects where agreement and change management are critical.
Yes. We will listen to your current situation, goals, and constraints and propose the most appropriate approach.
Yes. You can start with a small PoC, limited-feature development, or partial maintenance and scale up gradually.
Yes. Many projects start when requirements are still evolving. We can help clarify scope, priorities, and approach before formal development begins.
Yes. For confidential information, we will proceed with detailed discussions after signing an NDA.
Yes. We can discuss maintenance-only engagements, including systems developed by other vendors, subject to handover conditions.
Yes. Designing with the next phase in mind from the start helps reduce rework later.
Related Services
Related Services
Let's Find the Right Engagement Model Together
The right engagement model depends on your project status and priorities. Even if requirements are not fully finalized, feel free to contact us.