What's Hidden Behind Your Gantt Chart?

Not all case studies have fairytale endings. 

 

In fact, in order to compare one construction scheduling system to another, we need to take a baseline measurement.  This is what we did at an acute care facility in northern California.  We observed the construction schedule being managed with traditional CPM methodology and recorded the impact to the schedule (both in terms of labor costs, as well as schedule duration). 

 

This case study illustrates the negative impact of ASAP management -- or starting as many locations as soon as it is possible.  This stands in stark contrast to LBMS methodology where we wait for locations to become free and clear so work can continue unimpeded.  This video also illustrates both the blow-fly effect and flat-lining where crews are dispersed after work has started on a particular location.  Not only does the location suffer, but remobilizing the crew takes significant managerial effort.  The resource histograms show this jobsite variability which we know lends itself to safety issues and increased project risk.  By measuring just the impact of the electrical work, this case study documents that over 6,600 manhours were wasted onsite, costing the Owner over $600,000. 

 

If we extrapolate those figures across the trades, this case study proves that managing to start dates and throwing resources at open areas actually causes more harm than good and sends the construction schedule into a death spiral.  

 

 

 

Please also check out the following links to continue diving deeper into the subject matter:

Web Page: What Is Location-Based Management System

Web Page: What Is Flowline Scheduling

Web Page: What Is 4D BIM

Web Page: How LBMS and LPS Compare

Webinar: An Introduction to LBMS and Last Planner System

Webinar: Planning AND Controlling Your Construction Schedule

Webinar: CPM Match

Webinar: 4 Hospital Case Studies Featuring LBMS

Blog Post: Scheduling with Lean Principles (Part 1)
Blog Post: Scheduling with Lean Principles (Part 2)

Whitepaper: A Comparison of Tradition CPM to Location-Based Scheduling

Whitepaper: The Combination of Last Planner System and Location-Based Management System

Glossary: Sorting through the Acronyms of Construction Scheduling

FAQs: LBMS FAQs

 

We also offer a step-by-step guide to our 5D virtual construction workflow with video tutorials. These videos are just 2-5 minutes in length, but illustrate how to use a particular piece of functionality. You can access the video library index and view just what you need, or download the complete set of training videos. We have training videos for Estimators, Schedulers, Supers, and anyone who does CM Reporting.