A Process Decision Program Chart (PDPC) is a tool for identifying and documenting the steps required to complete a process. It is also useful for anticipating any issues and problems that might surface in the implementation of the process, therefore affording the opportunity to devise countermeasures.
An Interrelationship Diagram shows graphically the cause-and-effect relationships that exist among a group of items, issues, problems, or opportunities. It is particularly useful in helping to identify the potential causal relationships that might lie behind a problem that continues to recur despite attempts to resolve it.
A Tree Diagram is a chart that begins with one central item and then branches into more and keeps branching until the line of inquiry begun with the central item is exhausted. The tree diagram, with its branching steps, motivates you to move from the general to the specific in a systematic way.
Because processes will randomly fluctuate over time and will often deteriorate in the long run, Motorola introduced the practice of reducing their calculated sigma values by 1.5 standard deviations to provide a more conservative estimate of the long term performance of the process.
A Standard Operating Procedure (SOP) is a set of written instructions that document a routine activity that is to be followed by members of an organization. Standard Operating Procedures are essential parts of good quality systems. Sound and well-written SOPs should enhance consistency and reduce human error. Note: sometimes standard operating procedures are referred to as Work Instructions.
A Control Plan is a method for documenting the functional elements of quality control that are to be implemented in order to assure that quality standards are met for a particular product or service. The intent of the control plan is to formalize and document the system of control that will be utilized.
A Run Chart is a basic graph that displays data values in a time sequence (the order in which the data were generated). A run chart can be useful for identifying shifts and trends. A supervisor of a customer service center collects data on the number of complaints that are filed each month. Data for the last several weeks are shown below.
A Run Chart is a basic graph that displays data values in a time sequence (the order in which the data were generated). A Run Chart can be useful for identifying shifts and trends. Example: A supervisor of a customer service center collects data on the number of complaints that are filed each month. Data for the last several months are shown below.
The following formulas are used to compute the Centerlines for Statistical Process Control (SPC) charts.
A Run Chart is a basic graph that displays data values in a time sequence (the order in which the data were
generated). A Run Chart can be useful for identifying trends or shifts in process.
Example: A supervisor of a customer service center collects data on the number of complaints that are filed
each month. Data for the last several months are shown below.
