Example $6\mathrm{.}5-1$

A publisher has a contract with an author to publish a textbook. The author submits a hard copy

and a computer file of the manuscript. The $($simplified$)$ activities associated with the production

of the textbook are summarized in the following table:

Figure $6\mathrm{.}27$ provides the project network. Dummy activity $(2,3)$ produces unique end nodes

for concurrent activities A and $B.$ It is convenient to number the nodes in ascending order point$-$

ing toward the direction of progress in the project.