Mainframe: Useful Points in a JCL, when you are creating JCL

MAX No Of Procs in a JOB - 15

MAX No Of Steps in a JOB - 255

MAX No Of DD Statements in a JOB - 3273

Space O/S Allocates when you create a PS or PDS - 56KB

MAX No Of days for a JOB Can Be Executed Continueously in a MAINFRAME - 248 DAYS