Files PROB551.TXT through PROB858.TXT contain the data for the 32 test
problems used in table 7 of the Gagne, Price and Gravel 2002_Journal of 
the Operational Research Society_ paper.  The first two numeral in the file 
name signifies the problem size (55 -> 55 jobs, ..., 85 -> 85 jobs).  The 
files are plain ASCII text, with columns separated by spaces and/or 
end-of-line codes.

The first record of each file (one line) contains the number of jobs (n), two
zero (could be ignored - B&B results are not available), the problem file name et the problem 
caracteristics (processing time variance, tardiness factor and due date range).  
The next line, or group of lines, contains the n processing times.  The following 
line, or group of lines, contains the n due dates.  The due dates are a monotone 
sequence (jobs were indexed in earliest due date order); a negative due date signifies 
a job already overdue.

The next group of lines gives the setup times as an n+1 x n matrix, the row
indexed by the current state, the column indexed by the next state.  The
first row, row 0, contains setup times coming out of the initial state of
the processor.

