Waterfall model

MIS

1. WATERFALL MODEL



Waterfall model is introduced by Royce in year 1970. Waterfall model follows the SDLC
approach and states that “the phases are organized in a linear order and the output of one
phase becomes the input for the next phase.”

The waterfall model is a sequential (non-iterative) design process, used in software
development processes, in which progress is seen as flowing steadily downwards (like a
waterfall) through the phases of conception, initiation, analysis, design, construction, testing,
production/implementation and maintenance.

2. Advantages of waterfall model:
 This model is simple and easy to understand and use.
 It is easy to manage due to the rigidity of the model – each phase has specific
deliverables and a review process.
 In this model phases are processed and completed one at a time. Phases do not
overlap.
 Waterfall model works well for smaller projects where requirements are very well
understood.

Disadvantages of waterfall model:
 Once an application is in the testing stage, it is very difficult to go back and change
something that was not well-thought out in the concept stage.
 No working software is produced until late during the life cycle.
 High amounts of risk and uncertainty.
 Not a good model for complex and object-oriented projects.
 Poor model for long and ongoing projects.
 Not suitable for the projects where requirements are at a moderate to high risk of
changing.

When to use the waterfall model:
 This model is used only when the requirements are very well known, clear and fixed.
 Product definition is stable.
 Technology is understood.
 There are no ambiguous requirements
 Ample resources with required expertise are available freely
 The project is short.

3. Limitations of the waterfall model:
 The model implies that you should attempt to complete a given stage before moving
on to the next stage
 Does not account for the fact that requirements constantly change.
 It also means that customers cannot use anything until the entire system is
complete.
 The model makes no allowances for prototyping.
 It implies that you can get the requirements right by simply writing them down and
reviewing them.
 The model implies that once the product is finished, everything else is maintenance.

4. ASSIGNMENT OF M.I.S.
on
“SYSTEM DEVELOPMENT LIFE CYCLE”
&
“WATERFALL MODEL”



MASTER OF BUSINESS ADMINISTRATION


2015-2017


Submitted to: Submitted by:
Dr. Vageesh Paliwal Sandeep Kumar,
(Asst. Professor) Prashant Saini
(MBA III sem.)



FACULTY OF MANAGEMENT STUDIES
GURUKUL KANGRI VISHWAVIDYALAYA
HARIDWAR-249404