 Commentary by Prakasan Kappoth Subscribe via Email or RSS |  Biography |
February 18, 2010
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Light Weight Cycle Vs Heavy Weight Cycles |
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I decided to be fit this year and reduce my personal carbon footprint by introducing a bicycle in my daily life. I spent more money (considering this will be a worthy, onetime investment) than I would spend in a high class fitness center on this. This one is an imported bicycle, weighing about 5 -8 Kg (I heard there are cycles weigh just about 5 Kg!), and attracts lot of attention when I ride :) As we all know, the reduced weight is an important aspect of racer bikes to provide enough comfort, speed, modularity etc to the rider, but the reduced weight is also a big problem in India for the high end cycle consumer base, and may be in many other countries too. Here is why; I want to use this cycle for all my local travels, including going to shops, going to restaurants for my dinner etc. But, I'm really afraid to take the cycle for anything other than a morning fitness ride so that I don't have to "park" anywhere. I'm afraid of the theft if have I parked, even after locking the rear wheel as usually done; the reduced weight means even a 10 year old boy can lift the cycle and simply walk away! One obvious option is that I lock with a long chain, but we need some fixed, "intermediary" object to do that. This is the common solution available in some countries, but the super-system (government, perhaps?) has provided the options. Well, this is not my own problem by the way. I did a small search including the shop I purchased this. Interestingly, all the high end bicycle consumers are not using their cycles as much as they would like due to this reason. The bicycle industry is in India is growing. Unlike in the past, there are bicycles available for USD 4000.00 (costs more than a Tata Nano) and interestingly there are buyers (any bicycle above USD 500 will have a lead time of 3 weeks) for these varieties. Other obvious solutions are : As usual, I have tried to use this problem as a case study in my TRIZ sessions, and also wanted to hear from others through this commentory. While this is explained here only through the contradictions, application of 9-Windows, IFR and Trends would be more interesting for a real solution. Looking though the sub-system contradiction: I want a light weight cycle(for all the good thing I mentioned above) Vs I want the cycle to be heavy (So that no simple lifting is possible). There are more contradictions we can talk about, at sub-system, system, and super-system. What do you think are the contradictions, and solutions? I also shared this problem with my TRIZ friends, and here is an interesting illustration of TRIZ applied by Dr. Ragunath. In fact you cannot have a meaningful system contradiction with improving parameter being (weight of moving object) and worsening parameter being (weight of the stationary object) as the contradiction matrix for this is empty! If OTOH you read the classical TRIZ books you will find similar problems about ships to be light & heavy at different times and the solution being filling in/emptying out of sea water into the buoyancy chambers in the hull. This is separation in time principle for the resolution of this physical contradiction. Assuming that the weight of the bicycle does not change when it is moving or when stationary (except for your weight :) ), what other parameters are there to conflict resolution? if you forget the fact that heaviness is insurance against theft, what worsening parameter do you map theft to? Loss of substance :)? I used to attend college in Canada where lots of students come cycling. They used to detach their seats and front wheels and bring along with them to the class leaving only the frame and back wheel chained! The fear there was people used to steal the detachable parts of the bike :( Probably people won't steal what is not a whole bike (?) If you think of the worsening parameter (due to reduced weight of the (stationary)cycle - param 2) as Object Affected Harmful Factors (param 30), you get the following principles as applicable: 2 : Taking out 19 : Periodic Action 22 : Blessing in Disguise 37 : Thermal expansion Do you take out the valuable parts of a cycle to avoid its theft?Do you periodically peek to check if anybody is near the bike? Or employ someone to watch it? Can't think of blessing in disguise and thermal expansion principles here. Is potential theft of a light-weight cycle an object generated or object affected harmful effect? OTOH if you take the worsening parameter to be param 31 - object generated harmful factors you get the following principles: 35 : Parameter Changes 22 : Blessing in Disguise 1 : Segmentation 39 : Inert Atmosphere If the bike is so flexible that it can be rolled up and pocketed then may be parameter changes works. Inert atmosphere - is it a benign environment where you leave the bike without worry of theft? Or is it that you don't worry if it is stolen - like you cantrack it through GPS? Looks last solution is feasible but expensive than insurance? Even when one insures, the insurer would like to track, right? |
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Comments [10] | Permalink |
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| Categories: General, Methodology | |
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| posted by Ellen Domb [ http://www.trizpqrgroup.com ] | February 18, 2010 at 5:55 pm |
Great case study! A few remarks on the matrix re: blank cells. A cell on the diagonal is blank because it is a physical contradiction, NOT a technical contradiction (I want the bike to be heavy and I want it to be light, so use the separation principles, not the 40.) Some other cells are blank because there is no special group of principles that are more helpful than others, so you should try all 40. Also, there are several different levels of super-system, system, and subsystem here: The bicycle itself should be light, but the locking mechanism should be heavy is very different from the bike itself should be light and heavy. And the IFR might suggest that there is no lock the bike should prevent its own theft? I will be very interested to hear what your global audience has to say. |
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| posted by Pascal Jarry [ http://www.solidcreativity.com ] | February 19, 2010 at 4:11 am |
Nice study! It reminds me my own, a few years ago, but with ASIT method. We came up with the idea to use the post as a lock : i-Lock. ASIT method (derivated from TRIZ) was used six times during the project from 1) the concept to 6) decide that the bike frame will protect the screw when the lock is in position, instead of using complex screws). P. |
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| posted by Prakash [ http://trizit.blogspot.com ] | February 21, 2010 at 11:01 am |
Thanks, Ellen for the remarks. I'm looking forward to hear from others about the solution too. @ Pascal, thanks for the wonderful example. I feel, there could be something interesting we can think about this problem too.. |
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| posted by Prakasan Kappoth | February 28, 2010 at 8:18 am |
Interesting, Shri Phadnis. Please complete this for everyone to understand this way of problem solving! |
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| posted by Prakash [ http://trizit.blogspot.com ] | March 4, 2010 at 11:55 am |
Thank you for your comments, Aditya. You have mentioned all the problems here, except the problem I'm facing, which I think is pretty obvious from the blog, and I have directly explained that using contradiction. |
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