TOPSIS - Technique for Order Preference by Similarity to Ideal Solution

[@manojmathew5287]

For MATLAB code to solve MCDM problem watch this video kzbin.info/www/bejne/eqXPlGufrc5rask Please subscribe my channel and press the bell icon to get notifications. Also visit my wordpress site mathewmanoj.wordpress.com/multi-criteria-decision-making/

[@tarashankarsharma3372]

Hi @Manoj which books are you using for MCDM

[@manojmathew5287]

I don't use a particular book but refer different journal papers

[@mercyogunnusi5480]

Hello Manoj, thank you for this video. Can you explain how you arrived at "0.25" that you used in multiplying the "normalised performance value"? Looking forward to your response soon. Best regards. Mercy

[@sudarakaabeywardhana7348]

@@manojmathew5287 thank you sir, it would be important if you could upload a video explaining HELLWIG method under MCDM.

[@sudarakaabeywardhana7348]

@@mercyogunnusi5480 There are three ways of defining weights to diagnostic variables: subjective approach, objective approach and integrated approach. i think in this explanation use subjective approach.

[@SuperPwang]

Thank you so much Professor for your simplified TOPSIS explanation. I look forward to the explanation of weight calculation in TOPSIS.

[@abhishekpadmwar5615]

Sir myself Abhishek padamwar....right now I'm pursuing Mtech from NIT Bhopal....u have taught me material science in SSIPMT ... people here are loving ur videos on MCDM techniques..thank you.

[@Sandwichplss]

These videos have been super helpful. Thanks for the concise explanations!

[@wyattlin3120]

Very informative, clear and easy to understand, exactly what I am looking for, thank you.

[@sinh8633]

thanks sir!!!. This is only video tech for TOPSIS method !

[@citizencitizen3040]

Very nice Explanation brother... Thanks...

[@adegbolamark4516]

This is the best video I have seen in a long time

[@vienigood]

Thank you so much for the clear explanation! There is only one thing that I do not undestand: the 0,25 weightage introduced at minute 2:38 is always the same for each criteria? Or we are able to choose the weight that we like the most? Like for example 0,40 for the price, and 0,20 for the other 3 criterias, giving always sum 1. Thank you very much!

[@soumyajitmajumder1474]

Dividing 1/ number of attributes, so I guess it will be same for All

[@kreechapuphaiboon4886]

I think you can adjust differently as long as all weighed values are sum up equal to 1. See the equations in Wiki

[@babakmanouchehri716]

Very clear, simplified and understandable explanation.Than you so much.

[@betulozturk6686]

It is really helpful. Thanks to this video, I did my homework very well. Thanks for your support!

[@gernelwalker2367]

Namaskaram Professor, you have comprehensive video tutorials. Thank you so much!

[@pck2s]

Best Explanation skill

[@nilotpalkar4468]

Thank you so so much sir. Such a great explanation.

[@sreejiththemindfreak]

Amazing explanation, Thank you !

[@kozmikpuding]

Thanks for your understandable English.

[@KhushnoodDigitalEntrepreneur]

Well explained ❤ Today I have learned in just 8 minutes 🎉

[@exterminator4808]

Thanks a lot for this lucid explanation!

[@subbulakshmimurugan]

Sir, very useful.thanks

[@emrem794]

Very very helpful, thanks a lot!

[@minhajafridi992]

you are the real mathematician

[@Knayal23]

Very useful video for beginners

[@busrayldz2356]

Thank you for your valuable supports Professor

[@mohsinmasood7710]

can we use the Pairwise-Comparison matrix method in topsis to do weights

[@manojmathew5287]

Pairwise comparison is done in AHP. Weight computation is not done in TOPSIS. You can combine AHP and TOPSIS. Weight computation using AHP and rank computation using TOPSIS

[@mohsinmasood7710]

@@manojmathew5287 Thanks a lot sir❣

[@mohsinmasood7710]

@@manojmathew5287 Which software should we use to do analysis after combining TOPSIS and AHP. can I use expert choice?

[@raahymkhan1265]

I will give a presentation about Algebraic linear equations, could I present the problem solved in this vedio as an example of Algebraic linear equations??

[@manojmathew5287]

ya sure you can

[@moniqueBedo]

Thank you so much for the video. I was very confused with TOPSIS and AHP. I want to ask if in TOPSIS the weight can be different from 25 in each criterion or if I want to change the weight of each criterion I must do AHP? it is like this how both methods work? Hope you can help me.

[@manojmathew5287]

yes for finding the weights you can use AHP and for calculating the final rank of the alternative you can use TOPSIS. You can change the weights of criteria as per decision makers preference.

[@chinesecultureinessence1534]

Great stuff, thanks a million!

[@adrianetto]

I don't understand a single step: during normalization, for the first column (Price ) why do you use the formula x/SQRT(...)^2 instead of 1-x/SQRT(...)^2 ? In the video about normalization we learned that vectorial normalization for cost criteria is 1-x/SQRT(...)^2.

[@manojmathew5287]

Yes you are correct i.e. in vector normalisation 1-(x/sqrt(..)^2) is used in case of cost criteria, but if you do so in the case of TOPSIS, then the performance value of alternative with best value(200$) will be normalised to maximum value, and while selecting the ideal best you cannot take minimum value. Please refer the part where i have taken : 1. minimum value for ideal best and maximum value for ideal worst(cost criteria) 2.maximum value for ideal best and minimum value for ideal worst(beneficial criteria)

[@adrianetto]

@@manojmathew5287 Thank you very much for your explanation.

[@sachin0721]

How we can calculate the values weights of each criterion for TOPSIS? please explain

[@nickmarvyaryap2202]

how can we get the exact values of criteria weights?

[@nurhazera8400]

Hi. How do you define benefit and cost criteria? Does the criteria need to be evaluated by the expert or we can simply determine whether the criteria are benefit or cost based on their characteristic? For example: If the criteria are something that related to money, then it is cost criteria. Thank you in advance!

[@manojmathew5287]

The nature of criteria is defined by the decision maker. Just check whether lower value is desired or higher value is desired. If lower value is desired then the criteria is defined as cost criteria, if higher value is desired then the criteria is defined as beneficial criteria. An example: -for a person who is selling something, he wants the product to be sold at higher price, so in this scenario price will be a beneficial criteria. -for a person who is buying a product, he wants the product to be bought at lowest price, so in this scenario price will be a cost criteria. So, decision-maker defines the nature of the criteria.

[@nurhazera8400]

​@@manojmathew5287 I see. Thank you so much for the clear explanation. :)

[@yiannisfalkonakis3335]

Thank you for your explanation. What is the name of this normalisation technique?

[@Sandwichplss]

Can I have the alternatives as the columns instead? More convenient when dealing with tons of criteria Edit: Tried it out in Excel works fine

[@manojmathew5287]

ya sure you can solve it, in the formula "i" will become "j" and "j" will become "i". you can use MATLAB code if you want to solve decision matrix with lots of criteria.

[@Sandwichplss]

@@manojmathew5287 Yup thanks, managed to figure it out. Thats a good idea but i have no experience with MATLAB and on a tight schedule. Thanks again

[@s_ri_ju671]

Thanks a lot for the video, I want to ask you how the weight 0.25 comes for each column?

[@manojmathew5287]

Weights are defined by decision makers. It's based on the priority of criteria

[@sarahmestiri1855]

great explanation. thanks

[@sadiqhandle]

Please how did you find the Weightage?

[@manojmathew5287]

In this video, I have assumed the weights. I have given equal weights to each criteria. You can compute weights using methods like AHP, CRITIC, entropy etc.

[@Ram-zd8tm]

if u can explain about entropy method and how getting the criteria from this method . thanx

[@manojmathew5287]

ya sure

[@شيرينعلاء-ز4غ]

Great job 👏👏👏

[@sarrakhstalks3111]

very helpful thank you

[@butttariq992]

Can we use the linear normilization for TOPSID

[@CEDMOOLARAJASREE]

Dear Professor, Same formula (vector normalization) has been done for beneficial and non-beneficial criteria. Is that correct? or do we have to use separate formula for the criteria.

[@manojmathew5287]

That's the formula given by the maker of TOPSIS, so people use that formula, but this normalization results in rank reversal in TOPSIS. You can modify it, publish it and name it as RM-TOPSIS (Rajasree's modified TOPSIS).

[@edadan]

That was a great explanation. Thank you! I have just one question that wasn't clear from your video. Is the "weightage" based on the number of criteria? In your example, there were four criteria and you used 0.25 as the weightage. If there were five criteria, would you use 0.2 as the weightage?

[@manojmathew5287]

Thanks, I assumed that all criteria are of equal weightage, so in case of 4 criteria, 100%/4=25%=0.25. There are many methods by which you can define relative importance of criteria. Please go through the web page for more details. mathewmanoj.wordpress.com/multi-criteria-decision-making/

[@edadan]

@@manojmathew5287 Thanks again!

[@laurahaydee6007]

hello! How did you get the weightage? Best regards

[@manojmathew5287]

In this video, I just assumed the weights. You can use any weight finding methods to calculate the weights. Please check my other video to know more.

[@sudarakaabeywardhana7348]

thank you sir, it would be important if you could upload a video explaining HELLWIG method under MCDM.

[@AminulIslam-vp7vw]

Please make vedio on fuzzy TODIM

[@konstantinaarnaoutaki5056]

I wanted to ask is it possible in Topsis (and also MAUT) instead of setting as objective the maximization or minimization of any criteria to set as a goal that these criteria are within a range of values e.g [0,5] and how is this reflected in the methodology?

[@Avtarsingh-bp3zr]

sir, what is name of normalization technique that you used in this video to make normalized matrix

[@kaliprasad6143]

Bro how you assigned weightage

[@manojmathew5287]

in this video i have just assumed the weights, but you can use AHP and Fuzzy AHP to find weights based on decision maker's preference..

[@9831489855]

Sir can you please make a video on VIKOR model ? It would be immensely helpful .

[@manojmathew5287]

ya sure.. i will upload it with 2-3 days

[@nehasinghjaswal]

Thank you so much sir :)

[@Risktaker-q2n]

thank you for this video...

[@nabilaalyazahra2772]

thankyou so much, could you please create another tutorial about AHP-PROMETHEE METHOD? thanks, I really appreciate it

[@saurabhshukla7740]

Sir share any video for psi optimization technique

[@Sameer.sharmaji]

neither did i understand it.. nor it is of my near use... but i watched it because i missed you...

[@manojmathew5287]

@sankalp, all the best for your future endeavours. God bless.

[@Sameer.sharmaji]

@@manojmathew5287 thank you sir🙏🙏

[@amayrolzakaria3569]

Dear prof, thanks for the brilliant explanation, i have one question. Let say i am strictly required to calculate the criteria by using TOPSIS, may i calculate apposite? change the position of mobile and criteria(cost etc.)

[@sefayay1249]

how can we do with decision makers?

[@anisahmednacer5410]

Thank you so much

[@Sandwichplss]

Hey Manoj, thanks for your work. I wanted to ask if you could link where you got your formulas from. People use all kinds of notation and i prefer yours the best but i need a reference

[@manojmathew5287]

I made this video few months back so i exactly don't know the paper from which i took the formula, you can take any standard paper and compare the formula and can easily understand their notations.

[@Sandwichplss]

@@manojmathew5287 Yeah thats what I ended up doing. I built a small excel model using your notations and was too lazy to change them all to match my report

[@hamzabatool8355]

The only dislike for the vedio was the formulas were hidden behind the verbal speech.

[@zeleketirkaso6034]

give some clues for Sensetivity analysis now

[@masoumehhomayoon1611]

perfect

[@nadiaelias8024]

I dont understand, please help 😭😭😭

[@gulsenkeskin1303]

TODIM desktop application installation file link:​ github.com/gulsenkeskin/TODIM-Masaustu-Uygulama I would be very pleased if you share your opinions. Thanks

[@NoobgamerAS-13]

Nice accent

[@sigokii6952]

Thanks so much!