Question:
You have been hired by a computer consulting firm to develop an income tax calculation package for an accounting firm. You have designed a system according to the customer’s requirements and presented your design at a design review. Which of the following questions might be asked at the preliminary design review? At the critical design review? At both? Explain your answers.
a) What computer will it run on?
b) What will the input screens look like?
c) What reports will be produced?
d) How many concurrent users will there be?
e) Will you use a multiuser operating system?
f) What are the details of the depreciation algorithm?
The Preliminary Design Review (PDR) is a formal inspection of the high-level architectural design of an automated system and its software, which is conducted to achieve confidence that the design satisfies the functional and nonfunctional requirements and is in conformance with CMS' enterprise architecture. Overall project status, proposed technical solutions, evolving software products, and associated documentation are reviewed at a high level to determine completeness and consistency with CMS standards, to raise and resolve any technical and/or project-related issues, and to identify and mitigate project, technical, security, and/or business risks affecting continued detailed design and subsequent development, testing, implementation, and operations & maintenance activities. http://www.cms.hhs.gov/SystemLifecycleFramework/Downloads/PDR.pdf
From the above definition PDR must be conducted to ensure that the automated system or application being designed is in conformance with CMS' enterprise architecture and design standards. It involves scientific and technical objectives of the system. A detailed information and overall system design covering all aspects (electronic, mechanical, software) of the project or even the preliminary designs (block diagrams). For the instrument being used there should be a detailed interface specification between the hardware and software. Detailed budget and project plan and most of all major areas of risk and risk mitigation plans.
All the questions above are being discussed in the PDR stage because all the questions above involves reviewing the specific plans of the project, and should be conducted before any significant acquisitions or fabrication begins, and before any finalizations are produced. Budget and project plans should be refined and agreed to.
The question above implies are for the future implementation, it implies before the system should be design. Those questions are for PDR because it expresses before the fabrication of the system.
The CDR is generally intended to evaluate the proposed final designs, sometimes including constructed prototype modules or subsystems, but prior to commitment to final production. https://safe.nrao.edu/wiki/bin/view/GBT/ProjectReviews
As what I understand from above definition, CDR is for final polishing from the PDR stage of your system. It will just evaluate the proposed final designs. It will not touch those questions being tackled at the PDR stage. CDR is for ensuring if the system achieves the requirements being discussed during their PDR stage.
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