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OCR: PROGRAM CONSTRUCTS SEQUENCE ITERATION ... ALTERNATION ... Sequence Iteration statement 1 Do while Alternation statement 2 statement : statemunt 3 then ... statemions n statement 3 Erd Do Rise .. Station 1 WORKFLOW Station 2 sequence Station 3 Station 1 WORKFLOW Station 2 In-state iteration Station 3 WORKFLOW alternation i conditional state transition behavior) Station 1 Station 3 Station 2 Decision Point Station 4 FIGURE 3. Structured program and structured workflow.