lecture 8-2010 soft OR-ST

lecture 8-2010 soft OR-ST - lecture 8: soft OR, soft ST an...

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Spring 2010 - ÇG IE 398 - lecture 8 1 lecture 8: soft OR, soft ST an example characteristics of soft systems problems terminology a list of soft methodologies Checkland’s SSM: soft systems methodology” other methodologies
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Spring 2010 - ÇG IE 398 - lecture 8 2 hard/soft distinction is not absolute soft aspects are almost always present in any problem situation, and hard thinking can be useful even in pluralistic or coercive situations the soft perspective should not be pushed aside when doing hard OR and vice-versa and, most importantly , problem situations that look suited to hard OR are often more complex than they appear at first sight consider the BAKÜ-CEYHAN example [adapted from “Tools for Thinking” by M Pidd, Wiley 2003 ]
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Spring 2010 - ÇG IE 398 - lecture 8 3 the “BAKÜ-CEYHAN” example: oil from Bakü is piped by BOTAS to tanks in Ceyhan where it is then pumped into waiting tankers and shipped to consumption points technology used involves sections of flexible hose about one metre in diameter that connect the oil tanks, via pumping stations, to the tankers in the harbour hoses are subject to twisting forces and this sometimes causes the hoses to fail in service; when this happens there is a large spillage of crude oil until the pumps are switched to auxiliary hose lines until recently, the hoses have been bought from ABC, a supplier who was the originator of these flexible hoses and has been selling its current range of hoses for about 10 years; and, until now, the same company has provided replacements as necessary
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over the last two years, two new suppliers – TUV and XYZ - have appeared both claiming that their hoses are at least as good, though their production technology is different and allows them to undercut ABC prices by up to 40% new equipment may be needed to adapt pumping operations if TUV or XYZ products are to replace the ABC product. the BOTAS Port Manager (PM) is very keen to reduce his costs and has insisted that one of the pumping stations is switched to XYZ Hose for a trial period; there have been problems during this trial and the BOTAS Pumping Officer (PO) is unhappy about what he feels is a much higher rate of hose failure than was the case with ABC products Spring 2010 - ÇG IE 398 - lecture 8 4
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Spring 2010 - ÇG IE 398 - lecture 8 5 the PM, the PO, the BOTAS Maintenance Manager (MM ) and you (a BOTAS IE ) discuss the situation and the conversation goes something like this: PM : . .. Yes, I know that the hoses seem to fail a bit more often, but look at the price; we save 40% on the prices charged by ABC. I'm not bothered about shorter service lives with that reduction. PO
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lecture 8-2010 soft OR-ST - lecture 8: soft OR, soft ST an...

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