look first we choose some techniques according to srs that
is the wrk of pm which technique he/she will choose 
second as concerned with the integrating testing ,when
module is integrated with one another module u will be test
whetehr it fuctionally work properly or any other testing ,
its means example google email section ; login is a module
what u will be check in that whetehr it is accepting the
name and password and matching with the database , u will
not have other module means where it show the email , then u
have only checked that , after interation that module u will
check what is viewable to the user . next module compose ,
have to check that is working properly or not after
intergartion of otehr module its works or not , in real
enviorment u will not know whether it is module or set of
module its is design in such a way whole will be work as a
system