Our Business Models


Securing ultimate customer satisfaction

Waterfall Project Management Method

Choose one of the project management models that focuses on sequential, single-direction project execution. The Waterfall Model or Waterfall Methodology is one of the project management models that VSPL follows for all our projects. The linear progression methodology allows for efficient planning, accurate project cost estimation, meticulous documentation, and progress measurement with clearly defined milestones.

Stages in Waterfall Model

In the waterfall model, phase completion in the project resembles the flow of water in a waterfall. Only after the completion of a phase, the next phase is initiated. The amount and quality of the work done on the front end are comparatively higher along with the documentation at every step. So, time and cost estimation become comparatively easier. The 6 stages in the waterfall model implemented by VSPL are:


All project requirements are gathered and understood up front. The project brief provided when placing the order is analyzed and based on the analysis, the project manager defines the different metrics of the project such as the costs, assumptions, risks, dependencies, success KPIs, and completion timeline.

System Design

The software architecture is drawn up at this stage. Possible solutions are brainstormed and theorized based on client requirements. Later on, project specs are defined such as the programming language, frameworks, and wireframes/ mockups are finalized.


The concept and ideas in the previous stage are materialized here. Programmers create a working prototype that is a barebones but functional version of the final product. Most of the features are implemented at this stage.


Before the product is delivered to the client or before it is ready for deployment, our team of testers follows a checklist of the most stringent checks to ensure no errors pop up and all the client’s requirements are met.


The product goes live, once all the functional and non-functional testing has been completed. The team submits the deliverables to the client to be deployed or released.


Post-deployment, any updates or vulnerability patches are provided as a part of the maintenance phase of the model.

When to use Waterfall Model

Clear Project Requirement
Web Conferencing solution
Lenient Timeline
PBX Server
Simple and Small-sized Projects

Benefits of using the Waterfall model

The core benefit of the waterfall model is that all client requirements are laid out before project initiation. This makes project planning and execution as well as cost estimation easy to determine. The other benefits of the project management model include:
asterisk development