# Seven Basic Quality Tools

## Histogram as a Component of Seven Basic Quality Tool

Having been in the project management, training and coaching for over last many years, I witnessed that- The histogram is one of the powerful Quality planning and control tool to understand preventive and corrective actions. In a given situation, it shows the different causes of problems.  It reflects these frequencies in tabulated adjacent rectangles. The height of the bar or adjacent rectangles analysed further to discover corrective or preventive actions. As per the PMBOK® Guide Histogram is Define as  A specific…

## Control Chart as a Component of Seven Basic Quality Tool

A control chart is a mechanism to understand process behavior, predictability, and stability over time. We do know that any process has a certain amount of natural variability. But, how can we tell if the process’s variability has gone “out of control”? A control chart is a tool used in “Quality Control” for inferring an unplanned change has taken place in a process.  A process continuous variable X measures it. Example process variable could be but not limited to, like…

## Scatter Diagram: Scatter Plot and its Development

Scatter Diagram or correlation diagram is a tool to describe changes in a dependent variable in relation to any change in the independent variable. PMBOK® Guide Scatter Diagram as: “A correlation chart that uses a regression line to explain or to predict how the change in an independent variable will change a dependent variable.” This is basically an analysis of influence that comes from an independent variable to the corresponding dependent variable, and if there is a correlation whether positive…

## Pareto Chart – An Effective Graphical Tool to Resolve Problems

Pareto Chart is a useful technique to understand what the most effecting area of the problems is and where we need to put our efforts. A success of a project from the problem resolution perspective would not be judged by how many problems we have removed successfully, rather it would be judged by how effectively and successfully we find out about heavy hitter recurring product/service effecting problems and works to remove them. One important point is that these problems contribute…

## Check Sheet as a Component of Seven Basic Quality Tool

A Check Sheet is a tool to collect both qualitative and quantitative facts about quality problems. When it is used to collect quantitative data, then known as tally sheet As per the PMBOK® Guide Sixth edition defines Check Sheet as: A tally sheet that can be used as a checklist when collecting data   This is an effective tool from one of the 7 basic quality tools, both to prevent and detect problems by having structured valuable data about quality problems.…