Presentation, application, and data processing. Presentation, application, and data processing are the three logical and physical computing tiers that make up a three-tier architecture. A three-tier architecture is a type of software architecture that separates an application into three layers or tiers that run on different servers or machines. Each tier performs a specific function or role and communicates with other tiers through well-defined interfaces. The presentation tier is the user interface and communication layer of the application, where the end user interacts with the application. The application tier is the logic or middle tier of the application, where data is processed using business rules. The data processing tier is the data or back-end tier of the application, where data is stored and managed12

The statement of work (SOW) would clarify what the project implementation partner was contractually expected to complete after disagreeing with the project manager about completed requirements. A SOW is a document that defines the scope, deliverables, schedule, and terms and conditions of a project or contract. A SOW typically includes information such as purpose, scope of work, location of work, period of performance, deliverables schedule, applicable standards, acceptance criteria, special requirements, and payment schedule. A SOW can help to establish a common understanding and agreement between the client and the service provider on what needs to be done and how it will be done.

The statement of work (SOW) would be the next document that a project manager should update once the need to procure goods and/or services is identified. A SOW is a document that defines the scope, deliverables, schedule, and terms and conditions of a project or contract. A SOW typically includes information such as purpose, scope of work, location of work, period of performance, deliverables schedule, applicable standards, acceptance criteria, special requirements, and payment schedule. A SOW can help to establish a common understanding and agreement between the client and the service provider on what needs to be done and how it will be done.

Work with the project scheduler to update the project timeline. The project manager should work with the project scheduler to update the project timeline after finding an unforeseen dependency on one of the critical project activities that will most likely cause a delay. The project scheduler is a person or a tool that helps plan, schedule, monitor, and control the project activities and resources. The project scheduler can help the project manager to assess the impact of the dependency on the project schedule and identify any possible ways to mitigate or resolve it. The project scheduler can also help to update the project timeline with the revised dates and durations of the project activities and communicate them to the relevant stakeholders.

RACI is a tool that best illustrates how team members with different roles should interact on the team. RACI is an acronym that stands for responsible, accountable, consulted, and informed. RACI is a type of responsibility assignment matrix (RAM) that defines and clarifies the roles and responsibilities of each team member for each task or activity in a project. RACI can help to improve communication, collaboration, and accountability among team members and avoid confusion, duplication, or conflicts3