Simplex method of solving linear programming problem uses

Four jobs are to be processed on a machine as per data listed in the table.

If the Earliest Due Date $$(EDD)$$ rule is used to sequence the jobs, the number of jobs delayed is

Four jobs are to be processed on a machine as per data listed in the table.

Using the Shortest Processing Time $$(SPT)$$ rule, total tardiness is

A bracket shown in fig. is rigidly mounted on wall using four rivets. Each rivet is $$6mm$$ in diameter and has an effective length of $$12mm.$$

Direct shear stress in $$MPa$$ in the most heavily loaded rivet is