Search results
Results from the WOW.Com Content Network
DPMO is stated in opportunities per million units for convenience: processes that are considered highly capable (e.g., processes of Six Sigma quality) are those that experience fewer than 3.4 defects per million opportunities (or services provided).
In the long term, processes can shift or drift significantly (most control charts are only sensitive to changes of 1.5σ or greater in process output). If there was a 1.5 sigma shift 1.5σ off of target in the processes (see Six Sigma), it would then produce these relationships: [5]
The ability of a process to meet specifications can be expressed as a single number using a process capability index or it can be assessed using control charts. Either case requires running the process to obtain enough measurable output so that engineering is confident that the process is stable and so that the process mean and variability can ...
Control charts help identify when a process should be investigated in order to find and eliminate special-cause variation. The table below gives long-term DPMO values corresponding to various short-term sigma levels. [21] [22] These figures assume that the process mean will shift by 1.5 sigma toward the side with the critical specification limit.
Consider the following: You have a process that is divided into four sub-processes: A, B, C and D. Assume that you have 100 units entering process A.
DPMO may refer to: Defects per million opportunities , a measure of process performance Defense Prisoner of War/Missing Personnel Office , an agency of the United States Department of Defense
See Weight for detail of mass/weight distinction and conversion. Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound.
The Pareto priority index (PPI) [1] is an index used to prioritize several (quality improvement) projects. It is named for its connection with the Pareto principle named after the economist Vilfredo Pareto.