The optical disk project team has started gathering the information necessary to develop the project network$$predecessor activities and activity times in weeks. The results of their meeting are found in the following table.

Activity

Description

Duration

Predecessor

$1$

Define scope

$6$

None

$2$

Define customer problems

$3$

$1$

$3$

Define data records and relationships

$5$

$1$

$4$

Mass storage requirements

$5$

$2,3$

$5$

Consultant needs analysis

$10$

$2,3$

$6$

Prepare installation network

$3$

$4,5$

$7$

Estimate costs and budget

$2$

$4,5$

$8$

Design section $$point$$ system

$1$

$4,5$

$9$

Write request proposal

$5$

$4,5$

$10$

Compile vendor list

$3$

$4,5$

$11$

Prepare mgmt$.$ control system

$5$

$6,7$

$12$

Prepare comparison report

$5$

$9,10$

$13$

Compare system $$philosophies$$

$3$

$8,12$

$14$

Compare total installation

$2$

$8,12$

$15$

Compare cost of support

$3$

$8,12$

$16$

Compare customer satisfaction level

$10$

$8,12$

$17$

Assign philosophies points

$1$

$13$

$18$

Assign installation cost

$1$

$14$

$19$

Assign support cost

$1$

$15$

$20$

Assign customer satisfaction points

$1$

$16$

$21$

Select best system

$1$

$11,17,18,19,20$

$22$

Order system