Use Case Diagram Activity Diagram Use Case Descriptions: 1. Request Staffing: This use case describes the process by which the client company requests staffing services from PSSM. The client company submits a staffing request containing the type of professional or scientific employee they need, the experience and qualifications required, and the fee they are willing to pay. The contract manager reviews the request and enters it into the staffing request database if it is valid. The request is then sent to the placement department. 2. Find Suitable Staff: This use case describes the process by which the placement department finds suitable staff for the requested position. The placement department checks the staff database for qualified individuals and marks them "reserved" if they are found. A memo is created and sent to the arrangements department if a qualified individual cannot be found. 3. Contact and Place Staff Member: This use case describes the process by which the arrangements department contacts and places a staff member. The prospective staff member is contacted and asked to agree to the placement. After the placement details have been worked out, the staff member is marked "placed" in the staff database. A copy of the staffing request and a bill for the placement fee is sent to the client. 4. Close Request: This use case describes the process by which the contract manager closes the staffing request. The staffing request, placement fee bill, and unable-to-fill memo (if any) are sent to the contract manager. If the staffing request was filled, the contract manager closes the open staffing request in the staffing request database. If the staffing request could not be filled, the client is notified. Explanation: • Professional and scientific staff management (PSSM) is a specialized type of temporary staffing agency. Organizations often hire highly skilled technical employees on a short- term, temporary basis to assist with special projects or to provide a needed technical skill (1). • PSSM negotiates contracts with its clients, in which it agrees to provide temporary staff in specific job categories for a specified cost. The contract manager reviews the staffing request and enters it in the staffing request database if it is valid. The placement department looks for qualified individuals in the staff database and marks them "reserved" if they are found (1). If a qualified individual cannot be found, a memo is created and sent to the arrangements department. The prospective staff member is contacted and asked to agree to the placement. After the placement details have been worked out, the staff member is marked "placed" in the staff database (2). The staffing request, placement fee bill, and unable-to-fill memo (if any) are sent to the contract manager. If the staffing request was filled, the contract manager closes the open staffing request in the staffing request database. . The use case and activity diagrams depict the different steps involved in the PSSM process. The use case diagram contains four use cases: Request Staffing, Find Suitable Staff, Contacting and Place Staff Members, and Close Request. Each of these use cases represents one of the steps in the process. The activity diagram shows the flow of activities from the start of the process to the end. The use case "Request Staffing" describes the process by which the client company requests staffing services from PSSM. The client company submits a staffing request containing the type of professional or scientific employee they need, the experience and qualifications required, and the fee they are willing to pay. The contract manager reviews the request and enters it into the staffing request database if it is valid. The request is then sent to the placement department. . The use case "Find Suitable Staff" describes the process by which the placement department finds suitable staff for the requested position. The placement department checks the staff database for qualified individuals and marks them "reserved" if they are found. If a qualified individual cannot be found, a memo is created and sent to the arrangements department. The use case "Contact and Place Staff Member" describes the process by which the arrangements department contacts and places a staff member. The prospective staff member is contacted and asked to agree to the placement. After the placement details have been worked out, the staff member is marked "placed" in the staff database. A copy of the staffing request and a bill for the placement fee is sent to the client (2). • The use case "Close Request" describes the process by which the contract manager closes the staffing request. The staffing request, placement fee bill, and unable-to fill memo (if any) are sent to the contract manager. If the staffing request was filled, the contract manager closes the open staffing request in the staffing request database. If the staffing request could not be filled, the client is notified. . . • Overall, the PSSM process is a complex one that requires multiple steps to be completed in order to successfully place a qualified staff member. The use case and activity diagrams provide a visual representation of the process and help to clarify the steps involved. The use case descriptions provide further details about each step and help to understand the process a greater detail (3). References 1. Cicellin, M., Toma, A., Consizlie, S., Mescheta, L., & Aria, M. (2022). Temporary and permanent agency workers. A study of perceived organizational support and dual commitment. Employee Relations: The International Journal. 2. Truter, P., Edgar, D., Mountain, D., & Bulsara, C. (2021). An emergency department optimized protocol for qualitative research to investigate care seeking by patients with non- urgent conditions. Nursing open, 8(2), 628-635. 3. du Plessis-Schneider, S. (2022). The Need to Belong in Secondary School: A Social Work Science Study of Austrian and Australian Students.