The Quality concept first appeared inthe 1930s when Walter A. Shewart developed the control chart. Quality can be defined in many ways, because is a very broad theme. However, the more general concept is clients requisites satisfaction.At level of quality management one of the most well known concepts is certainly the PDCA – Plan, Do, Check and Act, that is a four-step process for quality improvement:
"Plan: define the goals tobe reached and plan how to implement the actions
"Do: implement the corrective actions
"Check: verify that the set goals are achieved
"Act: depending on the results that occured in the previousstep, take preventative measures
One of the most important points of quality is the quality tools, whose function is identify the errors, measure, analyse, control and also to proposeimprovement solutions to processes and products of a company, initially were adopted the “Seven Classic Tools Of Quality”
Seven Classic Tools Of Quality
Cause-and-effect diagram (also called Ishikawaor fishbone chart): Identifies many possible causes for an effect or problem and sorts ideas into useful categories.
Check sheet: A structured, prepared form for collecting and analyzing data; ageneric tool that can be adapted for a wide variety of purposes.
Control charts: Graphs used to study how a process changes over time.
Histogram: The most commonly used graph for showing frequencydistributions, or how often each different value in a set of data occurs.
Pareto chart: Shows on a bar graph which factors are more significant.
Scatter diagram: Graphs pairs of numerical data, onevariable on each axis, to look for a relationship.
Stratification: A technique that separates data gathered from a variety of sources so that patterns can be seen (some lists replace “stratification”...