Agile software development is a conceptual framework to minimize risk by developing software in short time boxes, called iterations, which is typically extends to four weeks. Each iteration is like a miniature software project of its own, and includes all the tasks necessary to release the mini-increment of new functionality: planning, requirements analysis, design, coding, testing, and documentation. While an iteration may not add enough functionality to warrant releasing the product, an agile software project intends to be capable of releasing new software at the end of every iteration. At the end of each iteration, the team reevaluates project priorities.

Scrum delivery Model
Agile software development method for the project management. Altech uses SCRUM when the project needs small, cross functional teams to produce historical results. Agile is a hyper- productivity technique.
Scrum is characterized by:

>>           A living backlog of prioritized work to be done.
>>           Completion of a largely fixed set of backlog items in a series of short iterations or sprints.
>>           A brief daily meeting (called a scrum), at which progress is explained, upcoming work is 
               described, and obstacles are raised.
>>            A brief planning session in which the backlog items for the sprint will be defined.

A brief heartbeat retrospective, at which all team members reflect about the past sprint.