In Manufacturing, Mining and many other industries, bulk commodities are received or delivered in batches or parcels of various sizes and with various properties.
Businesses are often required to schedule the usage of these commodities in quantities which differ from the deliveries. Often commodities are used on a First In First Out (FIFO) basis, or they may be scheduled to meet certain input qualities, ie: Constant or Min/Max of an input quality.
This post will give some basic ideas for this type of scheduling within Excel.
Scheduling First in First Out Usage
Unlike my previous posts, this post will not be walking the reader through the actual scheduling or setup of the worksheet, but will look at each section of the scheduling process and discuss the relevant points where appropriate with reference to the implementation in Excel.
The Scheduling Workbook, Page Sched1 shows a simple FIFO schedule using an Iron Ore mine as an example.
Each section below is highlighted in the sample workbook.
Section 1. Inputs
Various parcels of Iron Ore are presented in order of delivery to a plant or as mined.
Each parcel is of a different sizes (Tonnage) as well as having various qualities of 3 different properties, namely the Iron (Fe), Silicon (Si) and Aluminum (Al) content. These are expressed as percentages but could be Kg/t etc.
Parcels may further be categorized as High, Medium or Low Grade.
From a production point of view it is important to know how much feed is required to meet a certain output from a process or what the quality of mixtures will be.
Section 2. Production Schedule
The mine/plant has a production schedule, ie: a quantity of Iron Ore that it is expected to mine or process every month. The schedule may have ups/down to reflect shutdowns, holidays, changes in rosters/workforce etc.
Section 3. Schedule
This part does the mechanics of the actual scheduling, allocating parcels of each block until the monthly requirement is met.
In operation it takes the minimum of the size of each parcel minus what has already been processed from that parcel or the production requirement minus what has already been processed that month.
This is done using a simple Min and Sum formula.
Example: K18: =MIN($C18-SUM($I18:J18),K$6-SUM(K$9:K17))
Conditional formatting is used to highlight the cell as a scheduled cell (tonnes > 0)
Example: Conditional Formatting, Cell Value > 0
Section 4. Reporting
Reporting can be prepared for Month by month production, Cumulative from the start or Remaining until the end.
Sum and Sumproduct formula are used to calculate weighted average for elemental grades as you have the quantity of each parcel, each month and the associated grades in the input areas.
Example: Cumulative %Fe in April 10, K36: =SUMPRODUCT(K$10:K$31,$E$10:$E$31)/K$35
More complex Sumproduct formula are used to report by various classifications.
Examples:
Used High grade tonnage in march, J53: =SUMPRODUCT(1*($D$10:$D$31=$I52),(J$10:J$31))
Used Medium grade %Fe in April 10, K59: =IF(K58>0,SUMPRODUCT(1*(($D$10:$D$31)=$I57)*(K$10:K$31),($E$10:$E$31))/K$58,0)
Section 5. Charting
Having produced a schedule and associated reports you now have a large amount of data which can be plotted to suit requirements.
The Next Step
Once a schedule has been achieved you can feed the production quantities directly into a budget or other downstream system as required.
Scheduling Random or Planned Usage to Achieve Goals
Although the above example, Sched1, is simplistic, First In First Out schedules can and are used in real life. However often some degree of stockpiling is allowed.
This means that parcels can be used in a different order to which they are delivered.
Often this is done so that the input quality of the feed source is varied or maintained, ie Averaged at a level, maintained below or above a level or maximised or minimized according to constraints.
The Scheduling example file, page Sched2 offers a simple manual way to account for this.
Sched2 varies from Sched1 in that it allows manual selection of the order in which parcels are processed.
This is done by simply allowing the user to specify which order parcels will be treated.
The spreadsheet then does all the work with the added benefit of tracking stockpile levels, as often these must be maintained at certain levels.
The spreadsheet has the same reporting and charting functions available as in Sched1.
Summary
In both the examples the scheduling is done using simple, Sum’s, Min and Max formulas.
The actual scheduled production is highlighted using conditional formatting.
The reporting is done using Sum and Sumproduct formulas.
In both examples adjust the values in the various Yellow cells and watch the scheduled tonnages and qualities change.
Next
The purpose of this post was simply to introduce the reader to simple options for scheduling.
It is clear that you now have a simple process from which to derive inputs to a budget, tracking and prediction reports
The post doesn’t attempt to go anywhere near optimization of the schedule using linear programming or other techniques.
However you can see that the addition of Excel solver may be possible to attempt to balance or minimise or maximise outputs, but this is beyond this simple example.
Functions Used:
Min: =Min(Range) returns the Minimum number from the Range
Max: =Max(Range) returns the Maximum number from the Range
Sum: =Sum(Range) adds the values in the Range
If: =If(Condition, Do this if condition is true, Do this if condition is false)
Sumproduct: http://chandoo.org/wp/2009/11/10/excel-sumproduct-formula/
How do you Schedule your production scenarios? Let us all know in the comments below:
Next week: Word Art – Yes it has a use !
63 Responses to “To-do List with Priorities using Excel”
Very useful, you always give us good ideas for our excel files. Thanks
I've been working on calendars leagues. If you must watch a bit on my blog. http://economiaemergente.com/
EXCELLENTE!!!!
Needed .. thanks for sharing
[...] To-do List with Priorities using Excel [...]
Excellent spreadsheet. Nice work.
Ciao Peppe!, Tante grazie per compartire il tuo eccellentissimo lavoro in Excel. Tu hai a web blog? - Grazie Chandoo per la publicazione.
Hello Peppe, Thank you so much for sharing your most excellent work in Excel. Have you a web blog? - Thanks Chandoo for publication.
Hi Jose,
tanks for your appreciations and tks to Chandoo for publishing
my little job. it's a pleasure for me to be mentioned on my guru's blog.
Just to reply to Jose, I don't have a blog, but if you want to share some ideas or need some help don't hesitate to contact me also on twitter like @peppinogreco.
Regards
Peppe
Hi Peppe!
Thank you for this very useful excel spreadsheet!
Great!
I've learned a little bit of VBA during the last year, and get addicted to it, but sometimes, it makes us forget how powerful excel is, without macros.
Nice post!
Cauê
Hi Chandru,
A very good post. Though I had been reading your posts for a longer time, did not post any questions so far except for wishing and appreciating.
I have a question here. I had attempted to do something on my own (a little R & D) on the new year resolution template itself. However, I could not do it fully. Thankfully, you had provided the link for each step , which was exactly what I was looking for 🙂
I had done with the check boxes and also conditional formatting. I am glad indeed. I am able to highlight a row when a check box is checked. However, the value of the checkbox gets printed in the same cell which it was linked to. How can I avoid it ? I could not see it in the sample excel files you had provided.
I appreciate your help in this.
Cheers,
Raghavan alias Saravanan M
Jeddah | Kingdom of Saudi Arabia
Hi Raghavan... Thanks for your comments and I am glad you are trying to build this on your own. There is no way we can avoid printing the check box value in linked cell. If you do not want to see "TRUE or FALSE" in a cell, you do one of the following.
Dal Messico grazie tanti Peppe.
A great idea, thanks for shearing it with all of us.
Daniel
Lovely idea - downloading now.
What software is used to create the animated gif of the template in action? Love to replicate to simple demos on my site.
Cheers
Glen
@Glen
Chandoo uses Camtasia Studio to make the animated GIF's
You can read what else Chandoo uses here: http://chandoo.org/wp/about/what-we-use/
Cheers
I should have checked first.
G
Still defeated.
What I am looking for is the TORN edge effect as applied to the screen capture. I can see how to do this for captured images, not vidoes.
I wonder if they are post processed in some way?
Cheers
G
Sorted.
Capture white screen with torn paper edge with SnagIT
Make the inner of border transparent (Photoshop)
Add the image as an overlay in Camtasia.
Sorry to hijack an Excel thread with this - its been bugging me for a while.
G
Raghavan
I just make the font white for the cell linked to the checkbox or if you have shading applied then font colour = shading so its there but is not seen or printed.
John
Excellent! Thank you very much.
Excellent thanks!
Happy New Year.
Looks simple but excellent. Never knew you could do this without VBA.
Thanks Pepe
good day,
Please, how can I create a chart with scroll bar that is also dynamic in PPT.
I created the chart in Excel, but I need this information to be presented dynamically in powerpoint and when I put the bar rolls loses functionality. please can you help me?
Come nella migliore tradizione:grandi ma semplici idde dall'Italia.
bravo Peppe
This was outstanding. I have had two bosses give me to-do lists that I was very unhappy with. I went and added 15 more lines to this and it was really easy to so with a little reformatting and changing some links. THANKS!!!
Thanks. really usuful. Will be waiting for such thing in future.
Great tutorial! It would be interesting if someone could explain how to do the chart with detail: how to insert the values of the horizontal axis, to create the horizontal bar (the outlines) and the bar itself, etc
Hi Juan...
See this page for a tutorial on the chart - http://chandoo.org/wp/2009/12/17/quick-thermometer-chart/
[...] To-do List with Priorities using Excel [...]
Good Concept!
Downloaded it but, my Excel 2007 hangs and I have to recover it few times. Finally it opens but, everything is distorted.
Am I doing something wrong?
-DJ
Interesting idea.
You give e new way to track my actual planning.
But instead of using thermometer in this case, we can use a simple bar chart , with data is the total done.
Reasoning for that, with thermometer, you have to format all the small part of data with the same color. If you have more than 10 parts, it will take your time to finish.
I tested and it shown the same.
I'm searching for How to automatically add check box link to a new cells when we add new item?
Thanks for your interesting idea.
Thank you Peppe & Chandoo for sharing an awesome idea.
How do i increase the list ? I cant just drag down can I ? the check boxes perform the same way
VERY EXCELLENT THANK YOU VERY MUCH.
How do you increase the list? Formatting of the check boxes and shading etc does not copy correctly if using copy and paste or dragging cells down...
Thanks for this useful to do list.
I have the same question as TADOVN. This blog doesn't properly give instruction on how to add new task row. Following are my queries.
1) How do I add a new row?
2) If I copy paste the last row to create a new row, the check box get duplicated, i.e. if I click on the new check box on the new row, the previous check box also gets checked.
So the simple question is.. how do I add a new row so that it behaves the same way as other rows?
Thank you very much! Great to do list template.
Thanks for the template.
From an NGO organisation in Malaysia
Will someone please answer the question about how to add additional rows to this list? I love it, but this is a fatal flaw, as I frequently have many more tasks.
Thank you!
Below is how I added additional rows:
1) Select both columns H and N, right clicked, and clicked Unhide to reveal the formulas.
2) Select row 12 on the To Do List, copy it, and insert it below in the next row.
3) Change the 12 in cell C22 to a 13.
3) Drag your mouse and copy the formulas from cells I15, J15, and K15.
4) Paste the formulas below in cells I16, J16, and K16.
5) Right click on the check box in cell F22.
6) Click Format Control.
7) Click the Control tab.
8) In the Cell Link box, change the I15 to I16.
9) Repeat the steps above. (Change I16 in the Cell Link box to I17...I17 to I18, etc.)
10) If you are not seeing Format Control when you right click the check box, you need to make the Developer Tab available.
Leah,
If you follow my previous instructions, you still may need to go back and change the formulas in column K. They calculate the priority weights and go in consecutive order as you go down the column:
IFERROR(1/E10,0)
IFERROR(1/E11,0)
IFERROR(1/E12,0), etc.
Some of you who are more Excel savy may be able to figure out how to copy the formulas quicker. This is just the way I figured it out.
Thank you Dennis; I will try that!
I am sure I would love this and it will help me to accomplice my tasks efficiently . Thanks Buddy
How would I be able to delete one of the row (not use 6 for example) so it won't calculate it with the progress?
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Thank you so much for this post. I took me a bit to figure out how the checkboxes link to the rest of the sheet, but now that I've got it I've created a new page for every day so I can track tasks going forward. I've also added work tasks side-by-side with personal tasks. Once I did that I also thought it would be neat to see how productive I am week over week so I added a nice summery page. The summary builds on the percentage completion for personal and work tasks.
Love this template - so versatile and yet simple.
My next project is to get standard weighting for certain tasks so I don't have to keep remembering them.
Cheers,
Victor
I like this template. I may modify how the checkboxes work though for a couple reasons:
1) It's a pain to add more rows. If I want to add 10 more rows, it appears that I have to re-point each new object to the appropriate link-cell. Otherwise, they all point back to the copied row - checking one causes all of them to check.
2) I can't group and collapse rows in the checklist without all the objects stacking together and remaining visible in the lowest non-collapsed row. With a simple "x", this would be ok.
One solution would be to have a simple "x" instead of a checkbox object. I could just use an "x" to mark complete, and make the TRUE/FALSE based on an If formula (If "x" then TRUE; otherwise FALSE).
I downloaded the file, but it is a ZIP file with several subfolders and xml files. There is no workbook here. How do I open this in Excel?
thank you for the help and excellent ideas you share.
@Kris
Yes, Excel files are special Zip files that actually contain a number of files including your data
If the file opens like that save it locally as a *.zip file and rename it to a *.xlsx file
Open with excel normally
How do you change the color when it is completed....I have multiple companies and need to color code this template.
Thank you.
@S.F
Use Conditional Formatting
Hello! I have added additional rows, fixed it so that the check boxes work individually, AND made it so that the #% changes when each box is checked -- however the status bar won't move past the midway mark.
Any ideas on how I can get the progress bar to fill up the entire way once the list is complete?
If you right click the status bar, select 'Select Data' and go to 'Chart Data Range' and revise to include your expanded range. The bar chart colors may default to a predefined style. Right click the chart to reformat the Chart Area.
Or, to change the bar colors, I populated all rows w/ activities and rank and then left clicked the bar chart color that I wanted to change - went up to the ribbon under the home tab, selected the new bar color from the fill color dropdown.
Love the instant gratification of the status bar! Genius!
Thank you so much, what a great tool! God bless you for doing this for free!!
Awesome
Nice to show power of excel.
Over in the Chandoo.org Forums, Asshu has updated this witha VB Interface
Have a look and use if from: http://chandoo.org/forum/threads/to-do-list-vb-interface.28973/
Dear All,
There are good job done here & its very helpful for all.
God Bless You to you all for your valuable working.
Regards,
Chirag
Hi guys,
I've added additional rows, but the percentages in the thermo-meter don't reflect this when the boxes are checked. I'm lost with how to change this, so any assistance would be greatly appreciated!
Jake
@Jake
Can you please ask the question on the Chandoo.org Forums
https://chandoo.org/forum/
Please attach a sample file to simplify the solution
Hi Chandoo, how you do it for all this check list. it is using Excel VBA, I am not good it that.. still leaning part. and I was trying to figure out. Trying to understand all vba code and meaning and when I use which code.
do you have any guide line on this, i mean. Exp: dim is what, string etc:
for all this checking list does need to use VBA?
Thankyou
Peggy