OR-Library is a collection of test data sets for a variety of OR problems.
A full list of the test data sets available in OR-Library can be found here.
There are currently two data files. The first data file is jobshop1 This data file contains 82 test instances commonly cited in the literature. The format of these test instances is described within the file. The second data file is jobshop2 This data file contains PASCAL and C code for generating job shop scheduling instances. These instances are given in "Benchmarks for basic scheduling problems" by E. Taillard, European Journal of Operational Research 64, (1993), 278-285. Furthermore, all flow shop instances can be used as test instances for the job shop scheduling problem; see the file flowshopinfo. The first file is of size 128Kb (approximately); the second file is of size 17Kb (approximately).
Click here to access these files
Other test problems are available here