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You have probably seen simple web-based mobile phone
tariff calculators, but beware !
The problem of calculating the cheapest mobile
phone tariff is extremely complex not only because there
are so many different tariffs, but also because the
tariffs change so rapidly and different suppliers use
very different ways of defining them, (for example the
hours corresponding to 'peak period'). In addition,
individual use profiles vary dramatically.
No web calculator or salesperson has a hope of handling
this kind of complexity and the best that can be expected
is a poor and often highly misleading guess.
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We have solved this problem by implementing novel
research in fuzzy discrete global optimisation theory
carried out by
Professor Les Hatton
of Kingston University, London.
The computations necessary to find the
cheapest mobile
phone tariff for a typical use profile currently
require around two hundred million calculations. However,
even with such sophistication, our implementation takes only
around a second:
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