PPQA After Maturity Level 2

I work in an IT organization that achieved CMMI Maturity Level 2 several years ago (we let the rating lapse) and I was wondering if you had some ideas on the following two questions:

1) What types of activities would PPQA engage in if the org had been Maturity Level 2 (I think they could have pursued Maturity Level 3 and been close)? Please also consider that the company is pursuing other types of improvement methods and models such as lean/6-sigma and ITIL.

2) What strategies should we pursue to show the worth of PPQA? Even in the good old CMM days and SQA one of the issues I had was that it was difficult to show the practical monetary worth of these support functions; one generally had to take it on faith that PPQA/SQA delivered some degree of worth to the company. Any thoughts?

The answer to question 1 is simple. Just read the PPQA Process Area and GP 2.9. The PPQA activities include performing both process and work product audits of the project and organization processes. For Maturity Level 2 that would mean auditing your REQM, PP, PMC, SAM, MA, PPQA, and CM processes.

The answer to question 2 is a bit more difficult. Basically you are asking, what is the cost of quality? One method you can use is to look at the total cost for the project and analyze it using Crosby’s Cost of Quality Model. The total costs break down into two categories: the Cost of Quality and the Cost of Performance.

The Cost of Performance includes such things as: generating plans, documentation, and developing requirements, design, code, and integration.

The Cost of Quality breaks down further into two categories: Cost of Conformance and Cost of Non-Conformance.

The Cost of Non-Conformance includes fixing defects, reworking documents, updating source code, re-reviews, re-tests, patches, engineering changes, CCBs, external failures and fines, Customer Support, and Help Desk.

The Cost of Conformance breaks down to two more categories: Cost of Appraisal and Cost of Prevention.

The Cost of Appraisal includes reviews, walkthroughs, testing (first time), independent V&V, and Audits.

The Cost of Prevention includes training, policies, procedures, tools, planning, quality improvement, data gathering and analysis, root cause analysis, and quality reporting.

The cost of PPQA is included in the Cost of Prevention.

When you consider these definitions and cost break down, the only category that will be affected by PPQA is the Cost of Non-Conformance. When PPQA audits the processes and work products, the audits will reveal non-conformances with people following the documented processes and procedures, which lead to re-work. By addressing these non-conformances, the goal is to reduce or effectively eliminate the rework and that is where you can demonstrate the value of PPQA.

Hope this helps.

PPQA or VER?

I have a question. When people performa a review to assure than a coding standard is being used, is it considered a PPQA audit or a verification activity (VER)?

The correct answer is, it depends upon the nature of the review. If your documented software development process states that the coding standard is used to write code. Then a process audit of the software development process would be looking at the coding standard and determining if it was indeed being used by the developers. That would be a Process and Product Quality Assurance (PPQA) audit activity. If your documented verification process stated that a code peer review involves comparing the code to the coding standard, then that would be a Verification (VER) activity. And if your documented processes specified both of these conditions, then the answer to your question is both a PPQA audit activity and a VER activity. How you view the code review against the coding standard is therefore context dependant.

If you are asking this question because you are preparing your Direct and Indirect Evidence for your PIIDs and a SCAMPI A appraisal, then you will need to explain the context so the appraisal team will be able to correctly evaluate the evidence.

PPQA Audits

Would you please distinguish the different types of audits 1) Projects, 2) Process and 3) products? Does PPQA audit the Project, Process, or Product? Or all the three? And from which area do we need to collect improvements, 1, 2, or 3? I'm confused, can you help?

You say that you are confused. I Let me try to provide an explanation for what I think you are asking about PPQA. The intent of PPQA is to act as the eyes and ears of senior management to ensure that the practitioners are following the documented processes to produce the work products. So PPQA performs two types of audits: process audits and work product audits. Now the processes being audited can be at the individual level, project level, or the organization level. And the processes being audited are not restricted to the CMMI Process Areas. The organization has to determine which processes to audit based on its business goals and objectives, so there may be processes audited in addition to the processes covered by the CMMI.

A process audit is conducted by first studying the documented process and then interviewing the practitioners to determine if they are following the process as documented.

Each process has one or more work products that are produced by following the process. These work products can be at the individual, project, or organizational level as well. The work products can be audited by sitting at a desk and reviewing the work product against the documented requirements for the work product. Is the work product produced correctly? Does it contain the proper level of information? Etc.

Both process and work product audits will identify non-compliances. By analyzing the non-compliance issues, PPQA should be able to identify the underlying causes for the issues and recommend one or more process improvement suggestions.

MA and PPQA Questions

I have the following two basic queries about CMMI ML 2:

1. While writing a Metrics and measurement process, should we address the organization level metrics data consolidation and review. As ML 2 is project specific, is it proper to also document the organization level data consolidation? Also can anyone tell me, the right site for definition of metrics like requirement stability index, schedule variance, effort variance etc.?
   
2. Similarly while documenting PPQA process, is it proper to start with defining an organization level PPQA plan? I am looking for boundaries where to limit writing processes compliant to ML 2. I know that G.P 2.1 to G.P 2.10 must be in place to achieve CMMI ML 2, but the organization specific plans/areas must not be mentioned/documented at CMMI ML 2.

You sound like you are focusing on CMMI compliance rather than on your business goals and objectives. One of the basic tenets of the model is your business objectives. That is where your focus belongs. And if done properly, you will have the side benefit of being CMMI compliant. So, to address your questions:

1. When documenting your Measurement and Analysis process, you should focus on those measures that are important to you. Remember, the first MA practice SP 1.1 states “Establish and maintain measurement objectives that are derived from identified information needs and objectives.” So whatever you have identified as information needs and objectives, that should be your MA focus. At ML 2, for many organizations that are just doing this for the first time, I recommend the org take baby steps and begin with a project focus. But you don’t have to be restricted to the project, an ML 2 org may have also identified some org level measures as well. Go to the Practical Software and Systems Measurement web site for the specific measurement information you need www.psmsc.com
   
2. There are NO CMMI-imposed restrictions on the limits of PPQA. Your organization must define its own limits for the processes you are going to audit. Since GP 2.9 applies to all Process Areas, at a minimum for ML 2, PPQA applies to all of the ML 2 Process Areas you have implemented in your organization. But, if there are other processes that are critical and/or important to the success of your business, then it makes perfect sense to have PPQA audit them as well. Again, do what is right for your business.