1 / 34

Basic Queue Theory and Gantt Charts

Basic Queue Theory and Gantt Charts. Steve Harrison Wednesday 20 th January 2014 Seminar Room 2 MEC. Topics. Variation – A recap Basic Queue theory Gantt Charts – Process Building Blocks Other Variation Concepts.

Download Presentation

Basic Queue Theory and Gantt Charts

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Basic Queue Theory and Gantt Charts Steve Harrison Wednesday 20th January 2014 Seminar Room 2 MEC

  2. Topics • Variation – A recap • Basic Queue theory • Gantt Charts – Process Building Blocks • Other Variation Concepts

  3. “If I had to reduce my message for management to just a few words, I’d say it all had to do with reducing variation.”W. Edwards Deming

  4. Variation – what to do?

  5. Application – Responding to Variation Identify the Cause: If Positive: Maximise, optimise, replicate, standardise. If Negative: Minimise, eliminate. Special Cause Variation Reduce variation: Increase precision - make the process even more reliable. Not satisfied with median performance (result): Redesign process to get a better result Common Cause Variation 6

  6. Variation and Queues

  7. Variation & Queues 100% 80% 50% Procedure Time (Minutes) Consecutive Patients 80% rule is the most efficient balancing waiting and waste

  8. How to calculate • =(((Max – Min)/100)*80 )+ Min • 23 – 7 = 16 • 16/100 = 0.16 • 0.16*80 = 12.8 • 12.8 + 7 = 19.8 • 19.8 approx 20mins

  9. Plan Cycle Time = 20m

  10. Cycle time at 80% - PDSA 1 More Reliable More Variable

  11. PDSA - Plan

  12. PDSA - Plan

  13. PDSA – Do & Study

  14. Demand is increasing.... More slots needed...

  15. 80% = 21mins 3hrs = 8 Patients

  16. 80% = 18mins 80% = 21mins 3hrs = 8 Patients 3hrs = 10 Patients

  17. 80% = 21mins 80% = 18mins 80% = 14mins 3hrs = 8 Patients 3hrs = 10 Patients 3hrs = 12 Patients

  18. How do you reduce common cause variation?

  19. GSM

  20. More Queuing....

  21. Capacity required = 27

  22. Capacity required = 27

  23. Capacity required = 49 (5 beds less than separate units ~£400,000)

  24. Lung Cancer Clinic 13 + 11 = 24

  25. Lung Cancer - pooled

  26. And Finally - More Queuing....

  27. Which is best? S C Q S C Q C Q C Q S C Q S S C Q S

  28. S And Finally - Which is best? C Q Long C Q Short C Q Long S S C Q Long S C Q Short S

  29. Discussion

  30. Thanks!

More Related