He changed the way we measure things.
  • 91 years old
  • Born on July 18, 1926 in Mosul, Iraq.
  • Passed away on August 14, 2017 in Pittsburgh, Pennsylvania, United States.

This memorial website was created in memory of our loved one, Thomas Saaty, 91, born on July 18, 1926 and passed away on August 14, 2017. We will remember him forever.  Please join us for a memorial in the November timeframe to commemorate Tom (more information to come).  We hope that you will plan on attending ISAHP 2018 in July in Hong Kong www.isahp.org and you can look for all things AHP and ANP at www.creativedecisions.net

Posted by András Farkas on 25th January 2019
Dear John, For your kind letter I am highly appreciated. I am assuring you that I will do my greatest effort to disseminate Tom's works and achievements here in Hungary and preserve his memory. With my warmest regards, András (Farkas), Budapest, Hungary
Posted by Puneet Mangla on 23rd August 2018
He has been a great Professor. He helped the society by his academic and professional contributions. He showed the path for critical decision making which we all professionals use now.
Posted by Birsen Karpak on 18th August 2018
We remember you a lot Tom. Wonderful birthdays, thanksgivings spent with you. Visiting you, visiting different places together with you in Youngstown, in Canfield, in Pittsburgh, in Istanbul, in Canada name it, so many good memories. We love you....
Posted by Bo Huang on 15th August 2018
A year has past since you left us. I miss you, your kindness and humor. I love reading the joke books you gave me. I do hope I could add some joke into your joke book.
Posted by Claudio Garuti on 14th August 2018
Dear Tom, a year has passed since you left us. I miss your guide, your every-week jokes and amazing stories that you used to send by email to all of us, but over all I miss your Symposium hugs, our talks and sharing ideas. Love you so, Claudio
Posted by Lou Sander on 14th August 2018
I have just read every word of every Tribute below. I endorse all of them without reservation. Tom Saaty is truly a great man, who inspires everyone whose life he touches.
Posted by Saaty Astrid on 14th August 2018
Very Dear uncle Tom, déjà un an, je ne t'oublierai jamais. I think of you often.
Posted by Glenn Mazur on 14th August 2018
Tom, We sorely miss you. But your work lives on in all your followers. I am proud to have known you.
Posted by Hussein Najee on 14th August 2018
Met many through my life of 70 years in many countries but nobody left an impact on me like Tom; truly a towering person as a human being with a rich background who made himself since he was 16 when he left his family in pursuit of education. He not only attained the education he wanted but also gave mankind something to work on after he leaves.
Posted by Hussein Najee on 19th July 2018
I am no academia but met him through my wife Asma. This guy is unique in all its senses and he related to me and my Ethiopian/Yemeni background. Left an impression in me and will always remember him for supporting me morally and emotionally. Stronger and larger than the mountains and will always be remembered. He passed through life with a mission that will truly impact life and science.
Posted by Mujgan Sagir Ozdemir on 19th July 2018
Your loss is Heaven's gain... If there is a Heaven for the ones who worked very hard as a scientist, created ideas endlessly, and always shared those ideas with us without questioning like you, you Tom must be there now, You always will be remembered not only in your birthday but everyday..and after us, forever.
Posted by Nina Szklennik on 18th July 2018
Dear Professor, I will never forget You. You were an extraordinary man, scientist and friend. You left us so many of your scientific works, which we use every day in our work. At the AHP Conference in Sorrento`2011, I told You: "If young people would have such math teachers as You, everyone would love math." I told my students from the Białystok University of Technology (Poland) about You and Your scientific work. They were delighted. Thank You very much ! We miss you very much !!!
Posted by Elio Padoano on 18th July 2018
Dear Tom, a year has just passed and I cannot still find the right words to say how much I miss your friendship and guidance. Thank you! Elio
Posted by Emily Harker on 18th July 2018
Happy Birthday dear Dad. Memories of you keep getting stronger...thank you for your energy which continues to spill out here! I love you.
Posted by Meghan Porcella on 18th July 2018
Happy Birthday Grandpa! I miss you so much and think of you often, especially when retelling your favorite jokes!
Posted by José Manuel Magallanes on 18th July 2018
We miss you Tom!...happy Birthday!
Posted by Mujgan Sagir Ozdemir on 15th July 2018
We are having the first meeting without you, we miss you.
Posted by Flora Guillier on 13th July 2018
JUst a simple and big thought today as the symposium is taking place. Wish i could have been there to share the memories and new subjects that uses ahp and anp.
Posted by Rangsan Thammaneewong on 12th July 2018
Dr. Saaty is a very intelligent and kind hearted man. I was one of his students in 1988.Not only I learned how to think more systematically from him but also to understand that intelligence with love is even more powerful. I have met him a couple more times since graduated. This is a man who has shown what a legacy one can leave behind and has lived a meaningful live.
Posted by Chris Everett on 6th June 2018
Goodbye Dr. Saaty, though I never knew you at all you leave behind a body of work that has enriched my life, the lives of my colleagues, and the lives of the millions/billions of people who have benefited in unquantifiable ways from the improved decision-making that you made possible.
Posted by Kathy Alstrin on 24th February 2018
Dearest family of Dr. Saaty, My heartfelt grief for the loss of this wonderful man! I was privileged to have taken his last course shortly before his passing. He thought I was goofy for asking him to sign my copy of his books... now I'm so glad I did. What an amazing spirit!
Posted by Leopoldino Vieira on 10th February 2018
I did not personally know Dr. Thomas Saaty, but I knew through his work the Analytical Hierarchical Process - AHP that he shared with me in his writings, as well as the Analytical Network Process (ANP). Works that help me and also the decision makers to find a solution that best suits their goals as well as understanding the problem. Relying on mathematical models and psychology (The Psychology of Fonts) he formatted a combination of data judgments, mainly used to analyze complex decisions. Prof. Dr. Leopoldino Vieira http://www.leovine.com.br
Posted by Harwinder Singh on 8th January 2018
Professor Tom Saaty a great personality. I met him during ISAHP 2014. No words to express....A real GEM.
Posted by Sam Sharp on 29th December 2017
My first introduction to the name Saaty was through his book 'Non-linear Mathematics' which I studied in the seventies. I next encountered it when I became interested in the AHP and attended the 2009 ISAHP in Pittsburgh, principally to meet him. During my first conversation with him I mentioned that my AHP students tended to guess the priorities at the lowest levels of the hierarchy. His response was to punch me in the stomach and say "That is not AHP!" Another lasting memory relates to the last day of the symposium when he invited me to sit alongside him during a discussion session. This was apparently a reward for making a speech on behalf of all the overseas participants the previous evening on the river cruise, thanking him, Rozann and the organisers for their hospitality. During the discussion I ventured an opinion on something. He apparently approved because he leaned over toward me and whispered. "I could kiss you but I don't want to embarrass you.' The four days in Pittsburgh were amongst the most memorable of my entire career. With his wisdom, humour and intellect Professor Saaty cast a spell over the entire decision-making community from which we will all continue to benefit.
Posted by Michael Promentilla on 6th December 2017
Dear Prof. Saaty, You are such an inspiration to me..a great mentor and a creative scientist. Although I have not met you personally, it is indeed my privilege to have known you more than a decade through your books and papers on AHP and ANP while I was doing my postgraduate studies in Japan. The theory and tools you have developed played a significant role in my scientific and academic career, and I will always remember and honor you everytime I teach and use AHP/ANP in my class here in the Philippines. Thank you for your "beautiful mind" and I will always be grateful for your legacy, and I wish in another time, or perhaps in another parallel world, I would have the opportunity to converse with you in person and learn more about life and decision theory in particular. Yours truly, Michael Angelo B. Promentilla Professor of Chemical Engineering De La Salle University Manila Philippines
Posted by Angel Coca on 4th December 2017
Operations Research is Math and Professor Saaty used mathematics to create AHP an useful method in decision theory.
Posted by Daniel Aviles on 29th November 2017
" Knowing more does not guarantee that we understand better..." - Thomas L. Saaty, "Decision making with the analytic hierarchy process", Int. J. Services Sciences, Vol. 1, No. 1, 2008. Genius! I never met you but your work was (and still is) an inspiration for my development as a researcher. Peace to the family and a sincere condolence.
Posted by Nzinga René on 21st November 2017
I never met Prof. Thomas Saaty in person. I remember some years ago I was trying to apply Mathematics to real-world problems and I had this awesome privilege to receive some materials related to AHP/ANP from my supervisor who also suggested me to write to Prof. Saaty for a particular problem I had with the theory. To my surprise, despite my poor English, he and Mrs. Saaty replied my email so fast, answering my question and even sent some other materials. I was astonished for being the very first email I received from a scientist. I am thankful for his support and effort for providing an efficient scientific theory which helped me to use numbers for consistent decisions. My deepest condolences to the family and friends. My the peace of the Lord Jesus be with you all.
Posted by Mohamed Shalaby on 12th November 2017
Long time ago, in Summer 1972, this man introduced me to Operations Research at Cairo University. I listend as a newly graduate IE to him in Queueing theory, to Dantzig in LP, to Elmaghraby in networks, to Mangazarian in NLP, to Taha in IP, to Kamal el-Din in simulation, who were supporting our new MSc program voulantarily. He was among our distinguished grand dadies who made us love what decision making is and make it our career. His book, Queueing theory, was "The reference" for my generation in stochastic processess 45 years ago. I enjoyed the character, the drive, the motives, and the scientist. I, at 71 years old, realize through his rich trip what giving is. May Allah bless his soul.
Posted by David Taylor on 11th November 2017
A truly great man amongst men. The one person, more than any other, who encouraged me to take and pass my PhD. Sitting in his house discussing things intangible over lunch, remains one of my fondest and uplifting memories. So sorry to hear of Tom's passing. My thoughts are with the family. Rest In Peace, a real genius, Professor Thomas Saaty.
Posted by Theo Dijkstra on 1st November 2017
Professor Saaty was one of those truly great scientists who used their outstanding gifts and talents for the service of mankind. I respect him deeply. I fondly remember his very kind and helpful response to a query of mine, three decades ago, a query of a young person he had never met. My sincere condolences to Professor Saaty's family and friends. He will remain an inspiration to us all.
Posted by Angel Zang on 30th October 2017
Please accept my heartfelt condolences. I took Dr. Saaty's class over 10 years ago and was thoroughly amazed; it changed the way everyone thought about making decisions. I was impressed by him and appreciated his generosity in sharing his work and his family-Rozann and John have helped me with projects over the years, too. I have hoped many times that the people making the most difficult decisions know about his work and use it, too. I check out John's clients and the conference info sometimes, just to see what the world's best and brightest are doing with it.
Posted by Miroslaw Dytczak on 22nd October 2017
I would like to expres my deepest condolences to the family. Great teacher, great scientist, great men forever.
Posted by Konstantinos Kirytopoulos on 19th October 2017
A farewell to one of the most important contributors of the MCDA family. You will be sorely missed.
Posted by José Manuel Magallanes on 12th October 2017
Profesor Saaty será por siempre una gran figura en el mundo de la ciencia; y siempre permanecerá fijo en los recuerdos de aquellos que tuvimos la suerte de conocerlo y estrechar su mano. Lo extrañaré mucho, será muy raro llegar a Pittsburgh y darme cuenta que no podré pasar a visitarlo ni a disfrutar de su hospitalidad. Professor Saaty will a world science figure forever; and he will always stay in the memory of those lucky ones who met him and shook his hand. I will miss him so much... It will be very odd to arrive in Pittsburgh, and realize I will not be able to see him and neither enjoy his hospitality.
Posted by Henry A Donegan on 10th October 2017
Tom was a man of unequaled distinction. I had the honour of meeting him on a number of occasions and on each meeting he contributed to my decision making philosophy. I have to thank him for providing a learning base for countless PhDs. Bless you Tom Saaty.
Posted by András Farkas on 7th October 2017
I would like to express my sincerest condolences to the family on the passing of Professor Saaty. His distinguished academic achievements in maths and decision theory and some personal meetings with him in Pitt have helped me to make a modest contribution to multiple criteria decision making. Let him rest in peace.
Posted by Syafrizal Maludin on 1st October 2017
Thank you for outstanding achievement and contribution to the world of knowledge.
Posted by Thomas Harker on 1st October 2017
Thomas Saaty: my namesake. (Although his first reaction upon hearing this from his daughter Emily in 1986 was, "But I'm not dead yet!"). I'll never be able to fill your shoes, Grandpa, but I see more of you in me as I grow older, and am so blessed. Don't know whether it's genetics or the selective environmental pressures of the Saaty back porch: memorizing Renaissance artists (with quizzes of course), talking at length about God and the universe (I faked my way through most of those conversations, parroting back your big words and ideas until I understood half of them), laughing and always learning. Grandpa, I don't know if this world will ever again have a man of your character, but please continue to bless us with bits and pieces of it both inside ourselves and in the people we meet. I love you.
Posted by Chinh Luu on 14th September 2017
Prof. Thomas L. Saaty was so kind. He replied my emails with helpful comments on AHP model and AHP pairwise comparisons in my research although he did not know me. He is a famous professor and I am a student in a poor country. I am always grateful for his kindness. Rest in peace Professor Thomas Saaty, a great personality.
Posted by Syarif Hidayat on 13th September 2017
I have never personally met Prof Saaty, but I read some of his books and many papers concerning AHP-ANP. When researching for my dissertation I used Fuzzy-AHP method due to the complexity of the problem and data I needed to analyze, as well the many respondents with diverging opinions on the subject matters. Thank you Prof Saaty for developing such a useful method for researchers around the world. As a lecturer I noticed that many of my students go for the same method I used (AHP-ANP) without being instructed. That indicated that the method is so popular and not that hard to understand and use. Dr Syarif Hidayat - lecturer in the Faculty of Science and Technology, University of Al Azhar Indonesia - in Jakarta, Indonesia
Posted by Mark Ridgley on 7th September 2017
I am terribly sorry to hear of Tom's passing. What a loss not only for his close family, and for all of us who knew and loved him, but also for humanity in general. His drive to make the world a better place through the intelligent and humane application of mathematics--and to make math, especially through the AHP, the servant of mankind rather than lord over it, is sorely needed and will be greatly missed. His example and sage advice provided much guidance and mentoring for my own professional development, and I will be forever grateful. His humanity, generosity, and genuine caring touched my life immeasurably. I will miss him dearly and treasure the times we spent together. Sharing belly-aching laughs with him surely ranks near the top of those times. He'll remain one of the bright beacons of my life.
Posted by Nina Szklennik on 3rd September 2017
I was privileged to know him. He taught me so much. A beautiful mind, the best mentor, full of love and inspiration. Thank you for everything that you have done for me, for us, for the world. I miss you. I am so sad.
Posted by Sikuade Jagun on 1st September 2017
Emanation and absorption. Tom Saaty, the Genius, the Master, the Kind.
Posted by John Saaty on 1st September 2017
Tom remembered in the obituaries section of the newsletter of the International Society for Multi Criteria Decision Making (MCDM). Thanks to Luis Vargas for his thoughtful contribution. Dear members of the International Society on MCDM, The new issue of the newsletter is published today. You can find the newsletter on our website. http://www.mcdmsociety.org/newsletters/92017-september-2017.
Posted by Dori Davari on 27th August 2017
I just heard about it... I am so sorry and wish this hadn't happen. All I can say is that Professor Tom Saaty is always alive. I hope good things happen to his family that would help them tolerate this loss.
Posted by Jen Shang on 26th August 2017
Tom was a tremendous person, a great teacher, and one of the most influential researchers in current time. He is a dear friend whose company I truly cherished. Tom will be remembered by all of us as a man of great wisdom, courage and generosity. We love you, Tom! May your eternal soul find rest in perfect peace!
Posted by Glenn Mazur on 25th August 2017
Tom was the only Erdos 2 mathematician I could understand. Tom's classes made sense, even to a fellow like me. Perhaps it was his sense of humor - I still "regularly" read from my collection of his joke books. His work added quantitative rigor to my field of QFD, and AHP/ANP are now cited throughout our new ISO 16355.
Posted by Hameed Nezhad on 24th August 2017
Tom is one of the few people who changed the way I think professionally and personally. I am proud that I had started spreading AHP in China and other parts of the world. He will be remembered around the world for generations. I already miss him!
Posted by Majid Azizi on 24th August 2017
Tom transmitted me a lot of motivation to do my best researches and training. Tom was full of spirit and esprit. I am very sorry missed a good friend forever.

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