factory planning instance
step | product | location | a1 a2 a3
-----+---------+----------+---------
 1   | 1       | 1        |  0  0  0
     | 2       | 1        |  0  0  0
-----+---------+----------+---------
 2   | 1       | 1        |  0  0  0
     | 2       | 4        |  0  0  0
-----+---------+----------+---------
 3   | 1       | 2        |  0  0  0
     | 2       | 1        |  0  0  1
-----+---------+----------+---------
 4   | 1       | 3        |  1  0  0
     | 2       | 2        |  0  0  1
-----+---------+----------+---------
 5   | 1       | 5        |  1  1  0
     | 2       | 5        |  1  0  1
-----+---------+----------+---------
----------