Project Management Operational Problem Solving Implementation & Change Management Strategy & Alignment

Frank Patrick's Focused Performance Business Blog
This Focused Performance Weblog started life as a "business management blog" containing links and commentary related primarily to organizational effectiveness with a "Theory of Constraints" perspective, but is in the process of evolving towards primary content on interactive and mobile marketing. Think of it as about Focusing marketing messages for enhanced Performance. If you are on an archive page, current postings are found here.

Friday, July 25, 2003

User Stories and Buffered Schedules -- Clarke Ching, a regular participant on the APICS Constraint Management discussion group, points to a chapter of a new book (in progress?) -- User Stories Applied for Agile Software Development. The chapter (direct pdf download - 108kb) is titled Why Plans Go Wrong, and includes a nice, clear description of the rationale for buffered critical chain schedules...
"A Buffer Isn't Padding -- A buffer isn't padding. Padding is extra time added to a schedule that you don't really think you need but that you add just to feel confident in the estimate. Padding is when I take a conventional approach to building a Gantt chart, come up with three months, but tell my boss four months.

A buffer, on the other hand, represents a legitimate expectation of time we expect the project to consume. While I can, if all the stars align, make it to the airport in 63 minutes it would not be prudent for me to plan on that. I should perhaps plan on 90 minutes. If I arrive in 85 minutes I will have consumed 22 of my allocated 27 minute buffer. If I take 95 minutes I will have overconsumed my buffer and will miss my flight. The size of the buffer should be sized based on the duration of the items being buffered and on the consequences of over-consuming the buffer."
I like it. Like I said -- a nice clear explanation -- one that can be used with those that confuse buffers with padding and say "Buffers? We don't need no stinking buffers!"

I'm not sure how Clark found the chapter download, since I can't seem to find the rest of the book. Apparently, I'll just have to wait for Mike Cohn to finish the book in January.

posted by Frank - Permanent Link - |

Current Posts (Main Blog Page)

Previous Posts

It is a common delusion that you make things better by talking about them. - Dame Rose Macaulay



What's this XML thingie all about?


View Frank Patrick's LinkedIn profileView Frank Patrick's profile



Google
Web focusedperformance.com


FP's Recommended Reading
- From the FP Bookshelf...

...from My AStore

...and some ideas from Amazon...


Best of the FP Blog Archive
- The really good stuff...

Strategic Thinking and Improvement

Enterprise PM - It Starts with Strategic Interdependence

Face Reality

How to Think With Your Gut

Hugger-Mugger and Helter-Skelter

Managing for Murphy, Satan, and Yourself

More of the Same (Local/Global)

PMI Congress Notes: Using Risk Management for Strategic Advantage

Tell Me How You'll Measure Me and Ah, But What to Measure?

What's in Your Strategy?

Why Can't We All Just Get Along?

Why TOC Works
Project and Multi-Project Management
Critical Chain and (not or) XP

Defining Project Success (But for Whom?)

Down 'n Dirty w/TOC and PM (Part 1 of 5 consecutive posts)

End of Project Review

If Project Management is the Answer, What's the Question?

In Defense of Planning

It Ain't the Tools

Lessons Learned, Revisited

Predicting Uncertain Futures

Project Conflicts

Project Determinism (and other myths)

Project Portfolio Management

Promises, Predictions, and Planning

Removing Bottlenecks - A Core Systems Design Principle

Stage Gates and Critical Chain

Ten Top Sources of Project Failure (The Executive Version)

The Meaning of "Schedule"
Leadership and Change Management
Consistent Leadership Behavior

Invisible Dogma - Perpetuating Paradigms

Nothing But Value

On Assumption Busting

Personal Productivity - An Excuse?

The Psychology of Change Management

FP's Blogroll
- Other weblogs and sites I read


FP's Ryze Page


FP's Technorati Profile
- Click the pic



Who links to FP?


For Your Charitable Consideration:

Give Something Back Foundation

Global Virtual Classroom


FP's Link List
- Selected Sites and Resources

Critical Chain Discussion Group

Lilly Software: Visual DBR

Sciforma PS (Critical Chain Software)

Spherical Angle (Critical Chain Software)

Synchrono Supply Chain Planning Software


FP Blog Archives
- All the oldies, but goodies...

Current
10/09 | 09/09 | 08/09 | 07/09 | 06/09 | 05/09 | 04/09 | 03/09 | 02/09 | 01/09 | 12/08 | 11/08 | 10/08 | 09/08 | 08/08 | 07/08 | 06/08 | 05/08 | 04/08 | 03/08 | 02/08 | 01/08 | 12/07 | 11/07 | 10/07 | 09/07 | 08/07 | 07/07 | 06/07 | 05/07 | 04/07 | 03/07 | 02/07 | 01/07 | 12/06 | 11/06 | 10/06 | 09/06 | 08/06 | 07/06 | 06/06 | 05/06 | 04/06 | 03/06 | 02/06 | 01/06 | 12/05 | 11/05 | 10/05 | 09/05 | 08/05 | 07/05 | 06/05 | 05/05 | 04/05 | 03/05 | 02/05 | 01/05 | 12/04 | 11/04 | 10/04 | 09/04 | 08/04 | 07/04 | 06/04 | 05/04 | 04/04 | 03/04 | 02/04 | 01/04 | 12/03 | 11/03 | 10/03 | 09/03 | 08/03 | 07/03 | 06/03 | 05/03 | 04/03 | 03/03 | 02/03 | 01/03 | 12/02 | 11/02 | 10/02 | 09/02 | 08/02 | 07/02 | 06/02 | 03/02 | 02/02 | 12/01 | 11/01 | 10/01 | 09/01 | 08/01 | 06/01 | 02/01 | 01/01 | 12/00


Powered by Blogger

If you are interested in adding an easily updated weblog to your site, I would suggest you look into the free service provided by Blogger.

Who is FP?
Contact Focused Performance