Explain about the incremental model.
-  Have same phases as the waterfall model. 
 
-  Phases are 
 
Analysis.
Design.
Code.
Test.
-  Incremental model delivers series of releases to customers known as increments. 
 
-  The first increment is known as core product. Here only the document processing facilities are available. 
 
-  Second increment, more sophisticated document producing and processing facilities are available. 
 
-  Next increase spelling and grammar checking facilities are given.