Project Managers often report financial numbers to the management. In a dynamic world, these numbers are usually based on a lot of factors that may or may not be under your control. So the top management demands that the numbers be reported as per different economic scenarios – Optimistic, Normal or Pessimistic.
It is important to report and present the numbers in a usable format to the top management. They should be able to toggle the scenarios comfortably and see the results. Offset function comes to your rescue to ensure a great looking model with the flexibility of reporting multiple scenarios.
What is the offset function?
A few months back, I had written about the offset function and how it can be used to create flexible models. I had discussed at that point of time, why offset function is one of the most versatile functions and at the same point of time quite dangerous as well.
In this tutorial, we would see another usage (I feel simpler than last time!) of the offset function
If I were to borrow the signature of the function from my last post, the offset function reads something like: Offset( range, rows, columns, height, width )
I will use a similar example, but change the usage of the function a little bit!
So in the illustrated example, it starts from the C3 cell, moves 1 rows and 3 columns and then gives the value (15 in this case)!
This time Offset is NOT returning an array. It is returning a single value!
[Related: OFFSET, VLOOKUP & MATCH explained in simple words]
So how can this be useful?
The offset function can move the reference of the cell by n rows and m columns. That means that if I structure the sheet with different economic possibilities in different rows, I can always move the scenarios using offset function.
How was this achieved?
Step 1: The layout of the sheet helps me achieve this objective very easily. The first part of the sheet to select the scenarios is achieved using form controls
Step 2: The Scenarios are listed in sequential order, one after the other and the form control (combo box in this case) is linked to the name of the scenarios.
Step 3: Depending on the scenario selected, the index number of the selection changes. This number is fed into the growth rate and cost selection using the offset function.
Step 4: The model is linked to the selected scenario to report the P&L figures
As I told you, offset function is quite versatile in nature and can help you achieve a lot of flexibility in your model
Bonus Step
From your PM career you would have known that preparing a nice looking report as important (if not more) as generating correct results! In our scenario selection model, we highlight the selected scenario (the pink colored row) to give clarity to the end user. This is achieved using
Step A: A simple formula in conditional formatting and
Step B: Then using the $ referencing intelligently.
What functions do you use in reporting?
I am sure that if you are generating flexible reports and dashboards for reporting, you would be using some interesting functions and tools in Excel. I use Offset, Index, Match, Indirect, Mod. Which ones do you use?
Templates to download
I have created a template for you, where the subheadings are given and you have to link the model! You can download the same from here. You can go through the case and fill in the yellow boxes. I also recommend that you try to create this structure on your own (so that you get a hang of what information is to be recorded).
Also you can download this filled template and check, if the information you recorded, matches mine or not!
Next Steps
Chandoo and I are running a course on Excel for Project Managers to share with you the various tools and techniques in Excel that can make you an awesome Project Manager. We comprehensively cover aspects related to Planning, Tracking and Reporting apart from Basics of Finance and Advanced Techniques like Monte Carlo Simulation in Project Management in the course. If you are interested in learning more about the course, you can click here.
For any queries regarding the using Excel for Project Management, feel free to put the comments in the blog or write an email to paramdeep@edupristine.com
13 Responses to “Gantt Box Chart Tutorial & Template – Download and Try today”
Hi Chandoo
As one of your students I have followed your detailed example through with great success. However, Excel is acting in an unexpected way and I wonder if you could take a look?
http://cid-95d070c79aef808e.office.live.com/self.aspx/.Public/Gantt%20Box%20Chart.xlsm
On my version, I have to type 40239 (Which equates to 2 Mar 2010) to get the chart to display 31 May 2010 (which should be 40329)!!??
Have I done something wrong or is Excel acting up?
Thx
Oli
PS Your example file in 2007 displays correctly.
Hi,
I like this idea a lot, but I agree the name is a little drab.
As an American I may just be seeing things, but to me the combination of lines and bars on your chart looks like a bunch of cricket bats.
Maybe you could work that into a catchier name. 🙂
Cheers!
Here is some code I use to keep the axis synched.
It may be useful to some of your readers
It is based on a comment I saw on Daily Dose of Excel.
Function SynchGanttAxis(Cname, lower, upper)
'Sets the X min and X max for Category axis
Application.Volatile
On Error Resume Next
'
'Top Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlCategory, 1)
.MinimumScale = lower
.MaximumScale = upper
End With
'Bottom Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 2)
.MinimumScale = lower
.MaximumScale = upper
End With
End Function
Function SynchVerticalAxis(Cname, lower, upper)
Application.Volatile
On Error Resume Next
' Excel 2007 only
'Right hand vertical axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 1)
.MinimumScale = 0
.MaximumScale = upper
End With
End Function
@Oli.. Can you check your file again.. I see 40329...
@Dave: Even I saw things.. the bars actually looked like lollipops. How about calling this lollipop chart - now that would be yummy and goes along the tradition of naming charts after eatables (bar, pie, donut...)
@Bob: Superb stuff... thanks for sharing 🙂
Hi Chandoo
This looks really good and I think it can also be applied to show project phases / milestones.
Question: Thinking further could this be amended to display a project lifecycle (Idea through to Implementation say 7 phases) on one bar / row? Just imagine 20 projects within a programme all on one chart one bar each showing their respective lifecycle stages i.e. on one page.
Idea: As the Gantt Box Chart this is quite intensive to set up re formatting etc how about the added extra of once you have completed this to "Save as template" i.e. saves the formatting and layout of the chart as a template so you can apply to future charts. Simple to do and will save the time formatting etc again and again and again.
Therefore tip: Click on your chart demo and then click on Save As template icon (2007) - edit file name and click on save. Ready to use / apply via Templates in Change Chart Type window.
Thanks and be very interested if the lifecycle question can be resolved
Mike
How embarrassing.
I was obviously suffering from numerical dyslexia. I was one of those days.
@Mike H: You can easily make this chart to work like a generic project lifecycle plan chart. All you have to do is,
1. in a separate sheet define the steps of lifecycle and various dates in a table (with 5 columns for each of the projects you have).
2. now use a control cell to input the project name you want to show in the chart
3. based on the input, use OFFSET Formulas to get the correct data
4. Rest is same as the tutorial above
For more info on the dynamic charting visit http://chandoo.org/wp/tag/dynamic-charts/ and http://chandoo.org/wp?s=OFFSET
Your solution is really smart but in the en Excel isn't meant to do stuff like this. I, as a former PM, always thought is was frustrating that you had to do stuff like this for something simple like a Gantt chart. So I built Tom's Planner. And would like to plug it here. I think it really solves the problem you are trying to solve in the most efficient way. Check out http://www.tomsplanner.com for a free account or play around with the demo.
Hi there,
Chandoo - this is really a very nice and helpfull chart - I adopted it, so I can report a forecast or the delay of a certain task (coming from my role as an auditor for projects).
One topic I´m currently struggeling with: I do have a project lasting for lets say 12 month. For a management reporting, I want to have kind of snapshot, lets say one month back and 2 month in the future. I tried with the offset formula, but failed. Any idea?
Thx
Lopi
[...] Ein viel geliebter Klassiker ist die Erstellung von GANTT-Diagrammen mit Excel. Wir hatten das Thema wiederholt schon hier. Chandoo.org hat sich mal wieder mit einer neuen Variante hervorgetan: Das GANTT-Box-Chart. [...]
[...] [...]
Hi Chandoo - fantastic xls. One thing I can't figure out how to do is adjust the alignment of the vertical axis. I would like to left align so that I could indent to represent sub tasks. Can that be done? Or is there a better way?
I've been trying to work out if there's a way to show weekends on the graph. The closest thing I've got is to add them on a secondary axis, but then I haven't been able to keep both axis lined up together! Any ideas?
Following on from this - is it possible to show things like holidays?