Comments for 8020world Management Consulting

Comment on Tornado Charts in Excel 2007/2010 Update by Kelvin

Kelvin — Thu, 28 Oct 2010 07:35:07 +0000

I have almost everything working now, thanks!

However, I would like to link the base case value to a specific cell reference so that it updates automatically. Otherwise the chart looks very strange.

Any idea how to do this?

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Kelvin

Kelvin — Thu, 28 Oct 2010 05:41:23 +0000

Brilliant, thank you.

Now I have two problems:
1. How to put categories on left side of page, as in your example?
2. How to link base case value to cell reference so that it updates automatically?

Thanks for tips on these two problems.

Comment on Tornado Charts in Excel 2007/2010 Update by Gabriel

Gabriel — Thu, 21 Oct 2010 23:43:12 +0000

I have a problem, when I paste the chart into Power Point the vertical axis reverts back to the far right side and this ruins the chart…. I then tried manually switching it back in Power Point, which solved it. BUT then when I print it, it prints it as if I had not fixed it. I.e. it's PRINTING the screwed up version while SHOWING the right version on the screen. WEIRD.
Any explanations, solutions?

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Sramakrishnan

Sramakrishnan — Mon, 20 Sep 2010 20:41:15 +0000

Awesome! Thank you so much. Was very useful.

Comment on Tornado Charts in Excel 2007/2010 Update by jcmendez

jcmendez — Fri, 17 Sep 2010 03:55:01 +0000

Ola Hugo. Obrigado pela messagem.

I'm not sure what you mean by saying that the bar with value 4 is bigger than the one with value 6 (do you mean as "value" the delta?), but I can assure you the example is fully correct as of how a tornado chart for sensitivity analysis of a model should look like.

There are other charts named tornado, and they are used to compare two statistical distributions. You can see examples on Peltier's pages http://peltiertech.com/WordPress/tornado-charts-a… — from your comment I'm guessing this is what you are trying to do, and in that case, you only invert the category of one axis.

For the type of tornado chart that I'm showing, only one horizontal scale is used and all the values shown by the bars are a comparison against the "base case" (7 in the example). Then you read each bar as the variation versus the base case when a parameter changes.

JCM

Comment on Tornado Charts in Excel 2007/2010 Update by jcmendez

jcmendez — Thu, 16 Sep 2010 23:55:57 +0000

John – I use the regular text tool on Excel

Comment on Tornado Charts in Excel 2007/2010 Update by Hugo Mendes

Hugo Mendes — Thu, 16 Sep 2010 15:08:56 +0000

The bar with value 4 is bigger then the bar with value 6.
Try doing 2 horizontal axes, one with Vertical Axis crosses = 0 min = -14 max=14.
Inverse categorys in only one of them.
So then you have the correct bar scales.

Hugo L. Mendes (from Brazil)

Comment on Math on the simplified market adoption s-curve for Excel by Admirer

Admirer — Thu, 16 Sep 2010 02:43:29 +0000

Juan, you're impressive

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by jcmendez

jcmendez — Mon, 06 Sep 2010 22:30:03 +0000

Tony – the tornado chart does not have anything to do with how simple, sophisticated, "hard coded" or flexible is your analysis.

It is more about visualization of your results. Although I've seen tornadoes used in engineering/technical settings, the focus of what is presented here is managerial decision making, so keeping it simple with 4-5 key sensitivities works best *in that context*

In many cases, behind one of these charts there is a deep analysis using large models, and techniques like Monte-Carlo analysis. In others, the key sensitivities are determined by experience with a few subject matter experts. At the end, what is important is to find the appropriate level of analysis to support the required decision.

Hope it helps

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Tony

Tony — Thu, 26 Aug 2010 15:23:17 +0000

Isn't this just a hard-coded sensitivity analysis? This works really well for a small analysis, but if you have more than 4 inputs it will be very tedious getting the outputs for a chart.

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Sheri

Sheri — Wed, 04 Aug 2010 15:35:42 +0000

Brilliant!! Thanks SO much!

Comment on Modeling market adoption in Excel with a simplified s-curve by sridhar

sridhar — Sun, 01 Aug 2010 20:36:47 +0000

If we sum the penetration – are we supposed to get 1 – to represent 100% ?
i am getting 2 plus

Comment on Normalize Excel tables by Sach

Sach — Fri, 25 Jun 2010 14:08:03 +0000

HI Juan Carlos,

This could be very useful, but your images are not showing so I don't know if it's what I'm looking for. Would be great if you could resolve this.

Thanks!

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Ipung

Ipung — Tue, 22 Jun 2010 08:50:30 +0000

Thank you, great tip & trick.

Comment on Tornado Charts in Excel 2007/2010 Update by Rick Gilbert

Rick Gilbert — Tue, 25 May 2010 17:50:25 +0000

I understand why you got the data labels for the min/max/base values of the lever varaibles, but in the screencast I couldn't decipher the steps to get those values on screen.
Very elegant solution, by the way. Thanks!

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Scott

Scott — Sun, 02 May 2010 11:12:50 +0000

Thank you! Short and simple

Comment on Modeling market adoption in Excel with a simplified s-curve by mhde

mhde — Sun, 25 Apr 2010 14:23:07 +0000

Dear Sir,
Thanks for the usful information I read about Rogers theory, that you provided, and I need your kind help in the following: Im trying to use Rogers diffusion of innovations theory in my research study which is: the adoption of e-procurement system innovation in the public sector. I need your kind advice to let me know:
1.Do you think I can implement or use Rogers’s theory in this area?
2.is there any scale or model in Rogers that I can use to apply it in my subject? Where can I find it? I mean how I can apply Rogers’s theory in my research in a practical way?

Regards and many thank for your time, hope I can have help and advice from you [I really need it], or if you know some one who can advice me?
Have a good day

Comment on Tornado Charts in Excel 2007/2010 Update by John

John — Fri, 23 Apr 2010 10:56:36 +0000

How do you add the title to the chart? Thanks.

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Cecilia

Cecilia — Wed, 21 Apr 2010 16:42:00 +0000

THANK YOU! Easy steps to handle negative values.

Comment on Easy creation of tornado charts in Excel – 5 steps, no add-ins by Ben

Ben — Thu, 08 Apr 2010 18:35:26 +0000

It's perfect! Nice and easy. We would need more people like you in this world…