The technical improvement of Extol system development team mirrors the continuous evolution of the adopted tools and procedures.

Analysis Requirement

Specification Prototype

Approval Analysis/Period

Development

Quality Assurance

Homologation

Development Stages		UML
•  Assistance •  Requirement Gathering •  Specification •  Prototyping •  Analysis •  Development •  Testing •  Homologation or Q.A. (Quality Assurance) •  Production		•  USE Case - Cases of Use •  Activities Diagram •  Sequence Diagram •  Class Diagram