5 Why's, is a technique for discovering the root causes of a problem and showing the relationship of the causes by repeatedly asking the question, "Why".

8D, is a problem-solving methodology for product and process improvement. It is structured into eight disciplines, emphasizing team synergy.

Fishbone Diagram, also called the Ishikawa Diagram and Cause & Effect Diagram is a graphical tool used to to help workers focus on the causes of a problem rather than the symptoms.

Turtle Diagam, illustrats the elements of a process for the purpose of helping an auditor address the relevant question when conducting a process audit.

Pareto Analysis Diagram, focuses on efforts or the problems that have the greatest potential for improvement. Pareto uses the principle that 20% of the sources causes 80% of any problems.

Plan Do Act Check (PDCA), also known as the Deming Cycle, Shewhart cycle, or Deming Wheel is an iterative four-step quality control strategy, that understands and utlizes a systematic problem solving process.

Brainstorming, is a technique for generating a large number of creative ideas with a group or team of people.

Affinity Grouping, A tool that gathers large ideas, and organizes them into
groupings based on their natural relationships.

Quality Control Incident Investigation, is a three step reporting and identification process for quality non conformances with a corrective action plan.

DMAIC Problem Solving Worksheet.

A3 Report, Is a problem solving methodolgy that drives problem-solvers to address the root causes of problems which surface in day-to-day work routines, on one sheet of paper.

CAR (Corrective Action Request) or Corrective Action Report, is a request for a root cause remedy of a contractual non compliance.

SCAR (Supplier Corrective Action Request), is a systematic approach to solving a quality concern by the supplier.

5 Principles for Problem Solving Sheet, a five step problem solving methodology for problem solving and corrective actions for non conformances.

Deep Drill Analysis, is used to understand why the quality system failed.

PPS - Practical Problem Solving Report Form. An striaght forward simple two page report for problem solving.