Eight Disciplines Methodology (8D) is a method or model developed at Ford Motor Company used to approach and to resolve problems, typically employed by quality engineers or other professionals.
In 1986, the assignment was given to develop a manual and a subsequent course that would achieve a new approach to solving identified engineering design and manufacturing problems.
Finally the Prevention Loop explores the systems that permitted the condition that allowed the Failure and Cause Mechanism to exist in the first place.
In 1974, the U.S. Department of Defense (DOD) released “MIL-STD 1520 Corrective Action and Disposition System for Nonconforming Material”.
The basic idea of corrective actions and containment of defectives was officially abolished in 1995, but these concepts were also common to Ford Motor Company, a major supplier to the government in World War II.
Developed in 1974 and cancelled in February 1995 as part of the Perry memo,[4] you can compare it best to the ISO 9001 standard that currently exists as it expresses the same philosophy.
Taking into account the fact that the Ford Motor Company played an instrumental role in producing army vehicles during the Second World War and in the decades after, it could very well be the case that the MIL-STD-1520C stood as a model for today's 8D method.
[5] FMEA (failure mode and effect analysis) is a tool generally used in the planning of product or process design.