Spreadsheet Models for Managers

Getting Access to Spreadsheet Models for Managers

If Spreadsheet Models for Managersyou use Excel to model businesses, business processes, or business transactions, this course will change your life. You’ll learn how to create tools for yourself that will amaze even you. Unrestricted use of this material is available in two ways.

As a stand-alone Web site
It resides on your computer, and you can use it anywhere. No need for Internet access.
At this Web site
If you have access to the Internet whenever you want to view this material, you can purchase on-line access. Unlimited usage. I’m constantly making improvements and you’ll get them as soon as they’re available.

To Order On Line

Order "Spreadsheet Models for Managers, on-line edition, one month" by credit card, for USD 69.95 each, using our secure server, and receive download instructions by return email.
Order "Spreadsheet Models for Managers, on-line edition, three months" by credit card, for USD 199.00 each, using our secure server, and receive download instructions by return email.
Order "Spreadsheet Models for Managers, downloadable hyperbook edition" by credit card, for USD 199.00 each, using our secure server, and receive download instructions by return email.

To Order by Mail

Make your check payable to Chaco Canyon Consulting, for the amount indicated:
  • For the download: USD 199.00
  • For access online for three months: USD 199.00
  • For access online for one month: USD 69.95
And send it to:
Chaco Canyon Consulting
700 Huron Avenue, Suite 19C
Cambridge, MA 02138

To use the course software you’ll need some other applications, which you very probably already have. By placing your order, you’re confirming that you have the software you need, as described on this site.

Spreadsheet Models for Managers

We’ll work with function macros only 13/6
Session Links
  • Command macros
    • Require vast knowledge of Excel’s user interface
    • Require more understanding of VBA
    • Are less useful in implementing modeling techniques
    • Are more useful for building tools
  • Function macros
    • Useful for reducing work of modeling (example: Convolve)
    • Simplify managing the modeling organization
    • Illustrate powerful concept of software engineering: modularity

Usually, you have no choice about whether to use a function macro or a command macro. The task you want to perform determines whether you write a command macro or a function macro. But I’m often asked “Which is easier?” It’s a question whose answer is irrelevant to problem-solving, because the problem itself dictates whether you write one kind of macro or the other.

Nevertheless, I’m often asked which is easier. The answer isn’t simple.

Command macros are usually fairly simple conceptually, because they more or less capture in code a sequence of operations that you could perform with mouse and keyboard. And function macros are usually more sophisticated conceptually, because they often perform some rather complex mathematical computations. At the conceptual level, command macros are easier.

In implementation, however, command macros are amazingly difficult. Mastering the art of writing command macros requires mastery of a vast amount of knowledge about the Excel user interface. For example, if you want to paint a cell yellow, how would you do that? On the other hand, function macros tend to use a more limited range of VBA forms, and relatively less of the Excel user interface. Much less. Implementing function macros tends to require less knowledge of the Excel VBA environment. At the implementation level, function macros are easier.

It’s somewhat mysterious why people care about this, because you usually have no choice about which type of macro you need.

Last Modified: Wednesday, 27-Apr-2016 04:15:26 EDT

Function Macros

We focus on function macros in this course because they’re more likely than command macros to make a real difference in your facility with constructing models. For instance, when your customer wants to see result streams displayed as [Month1, Month2, Month3, Q1 Total, Month4, Month5, Month6, Q2 Total, …], you probably realize that such a layout makes copy/paste and fill very inconvenient. A macro can provide a simple means of producing the preferred layout from a more easily maintained pure month structure. It’s also easy to construct macros for running sums and running differences. Can you think of other applications for function macros that make your models easier to build and maintain?