Model the following process snippet. A typical army recruitment process starts by shortlisting all candidates’ applications. Those shortlisted are then called to take the following tests: drug and alcohol, eye, color vision, hearing, blood, urine, weight, fingerprinting, and doctor examination. The color vision can only be done after the eye test, while the doctor examination can only be done after color vision, hearing, blood, urine, and weight have been tested. Moreover, it may be required for some candidates to repeat some of these tests multiple times in order to get a correct assessment, e.g., the blood test may need to be repeated if the candidate has taken too much sugar in the previous 24 h. The candidates who pass all tests are asked to take a mental exam and a physical exam, followed by an interview. Only those who pass all these exams and perform well in the interview can be recruited in the army. 

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Customer Order placement needed Check order status Place purchase order Update details Provide shipping address Cancel order Receive product Until order is paid Make payment Fig. 4.6 Using an ad hoc sub-process to model uncontrolled repetition 40 + Order fulfilled