Relationship between SDLC or STLC

Stage 1: When Contract is signed or Organization got a project from the customer, by refering to SOW(Statement of Work) or Requirements the "UAT(User Acceptance Test) Plan is preparedand the same under goes reviews(Verification).

Stage 2. (Requirement Gathering):- Once requirement gathering or study is over the "SRS(Software Requirement Specification)" is prepared and it's reviewed(Verfication) and once SRS is finalised STP(Software Test Plan) is prepared and the same under goes reviews(Verification).

Stage 3. (High Level Design):- Taking SRS as input, HLDD (High Level Design Document) is prepared and same under goes Reviews(Verification) . Once HLDD is ready, refering the same ITP(Integration Test Plan) is prepared and the same under goes reviews(Verification).

Stage 4. (Low Level Design) :- Taking HLDD as input LLDD(Low level Design Document) is preparedand same under goes Reviews(Verification) .Once HLDD is ready, refering the same UTP(Unit Test Plan) is prepared and the same under goes reviews(Verification).

Stage 5. Coding(Impelementation):- Taking LLDD (Low level Design Document) coding will done and coding also under goes reviews(Verification).
This is all about Verification Part , Now on wards the Validation or Actual Testing starts

Stage 6. Unit Test :-Once coding of unit(s) is done , unit testing(Validation)w will be carried out by refering to the test cases (present in UTP).

Stage 7. Integration Test :- once all the units get tested, Integration testing (Validation)will be carried by refering to test cases (present in ITP).
CONTINUED ------------->