to solv a problm statment 1st of all we have to "Identify classes"
to identify classes
1) ''Extract nouns in Problem statment"
2) Eliminate irrelevent classes
3) Add classes by analyzing requirments
next step is Finding Assosiation
find relation ship between objects
1) Extract verbs connecting objects
2) verify acces path
then Identify Atributes f the Identified objects
then identify Operations
1) extract verbs connected with an object
2) eleminate irrelevant operations
then Identify Inheritence
1) search lines like "a kind of " by looking at key words like "Such as" "For example" etc.
At the end refine the Object model
for more details see Handouts page no 57-64
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