Control Quality

This article contains most of the important information you need to know about Control Quality process in order to answer questions related to this topic in the PMP Exam, I recommend you review this type of articles 1 week before your exam date, all information mentioned are based on PMBOK Guide 6th edition and PMP Exam Prep 9th edition for Rita Maclhy’s, ITTO refers to Inputs, Tools & Techniques and outputs.

This process is a part of Monitor and control Process group and Quality Management Knowledge Area with the following ITTO’s


  1. Project management plan ( Quality Management Plan )
  2. Project Documents ( Quality Metrics , Lessons learned register , test and evaluation documents )
  3. Approved change requests
  4. Deliverables
  5. Work Performance data
  6. Enterprise Environmental factors
  7. Organizational process assets.

Tools and Techniques:

  1. Data Gathering ( Check lists , Check sheets ,statistical sampling , Questionnaires and surveys )
  2. Data Analysis ( Performance reviews and root cause analysis )
  3. Inspections
  4. Testing and Product evaluations
  5. Data Representations ( Cause and effect diagram , control charts , histograms , Scatter diagrams )
  6. Meetings


  1. Work Performance Information
  2. Verified deliverables
  3. Quality control measurements
  4. Change Requests
  5. Project Management plan updates ( Quality Management Plan )
  6. Project Document Updates ( Issue log , lessons learned register , risk register , Test and evaluation documents )



  • It’s about monitoring and recording results of executing the quality management activities in order to asses performance and ensure the project outputs are complete , correct and meet customer expectations .
  • It’s performed to measure the completeness , compliance and fitness for use of a product or service prior to user acceptance and final delivery .
  • It is the process of ensuring a certain level of quality in a deliverable whether it be a product, service or result , it helps ensure customer acceptance.
  • It validate the changes against the original approved change requests .
  • Identify the need of quality improvements .
  • Mutual Exclusivity, two events are said to be mutually exclusive if they cannot both occur in a single trial.
  • Probability, Likelihood that something will occur on a scale from zero to one.
  • Normal Distribution, Probability density distribution chart , it have the shape of bell curve and it is used to measure variations .
  • Statistical Independence , this means that the probability of one event occurring doesn’t affect the probability of another event occurring .
  • Seven basic quality tools explained in the Plan quality management process could be used here as well .

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