This study consisted of evaluating the relative performance to a
selection of the most promising size-reduction techniques. Experiments
and comparisons were made among these techniques on a series of tested
problems to determine their relative efficiency, efficiency versus time
etc. Three main new methods were developed by modifying and extending
the previous ones. These methods were also tested and their results are
compared with the earlier methods.
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.