P chart the pick of the litter
This presentation is the property of its rightful owner.
Sponsored Links
1 / 25

p-chart: The Pick of the Litter? PowerPoint PPT Presentation


  • 106 Views
  • Uploaded on
  • Presentation posted in: General

p-chart: The Pick of the Litter?. Presented by Matthew Savage. Introduction. What are process improvement (PI) or control charts? Which process improvement chart is the pick of the litter? Which process improvement charts are full of fleas? The recommended approach.

Download Presentation

p-chart: The Pick of the Litter?

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


P chart the pick of the litter

p-chart:The Pick of the Litter?

Presented by Matthew Savage


Introduction

Introduction

  • What are process improvement (PI) or control charts?

  • Which process improvement chart is the pick of the litter?

  • Which process improvement charts are full of fleas?

  • The recommended approach.


P chart the pick of the litter

Types of PI or control charts

Measurement control charts

  • Individuals and Moving Range (X-Mr chart)

  • X-Bar & Range chart

  • X-Bar & Sigma chart

  • Others: Median, Cusum, Moving Average

    Attributes control charts

  • Nonconforming items (p-chart, np-chart)

  • Nonconformities per subgroup (c-chart, u-chart)


P chart the pick of the litter

Purpose of a control chart

  • Minimize the chance of making two types of mistakes.

    • Overcontrol

    • Undercontrol

  • Help you decide when to react and when not to react.

    • Special cause variation

    • Common cause variation


P chart the pick of the litter

Chart selection flow chart


P chart the pick of the litter

Benefits of attributes charts

  • Easy to understand data in percent form

  • Percent of _____ measure is common

  • Ratios are commonly used – per 1,000 patient days

  • Puts data in perspective

  • c-charts are easy to create and use


P chart the pick of the litter

Common problems with p-charts

  • Large samples (denominator)

  • Small samples

  • Rare events

  • Understanding of control limits

  • Detecting sample-to-sample variation

  • Plotting positive vs. negative occurrences & effect on control limits


P chart the pick of the litter

Large denominator


P chart the pick of the litter

Small samples


P chart the pick of the litter

Rare events


P chart the pick of the litter

Understanding of control limits


P chart the pick of the litter

p-chart – Where do you start?


P chart the pick of the litter

Is this process in control?


P chart the pick of the litter

Sample-to-sample variation


P chart the pick of the litter

Plotting negative occurrences


P chart the pick of the litter

Plotting positive occurrences


P chart the pick of the litter

Recommended approach

  • Continue to present data in percentage form

  • Consider a Dashboard chart for a snapshot

  • Consider a Run chart for basic audience

  • Consider an Individuals (X) chart

  • Migrate toward an Individuals chart and Moving Range chart (X-Mr)


P chart the pick of the litter

Dashboards for at-a-glance


P chart the pick of the litter

Basic Run chart


P chart the pick of the litter

Individuals chart


P chart the pick of the litter

Individuals & Moving Range


P chart the pick of the litter

Individuals & MR with Nelson rules


P chart the pick of the litter

Summary p-chart


P chart the pick of the litter

Summary Individuals & MR chart


Questions are welcome

Questions are welcome

Contact Information:

Matthew Savage

[email protected]

937-885-2255


  • Login