Using the data set, draw a network diagram $($Fig$.6\mathrm{.}4)$ and complete a forward and backward pass $($Fig$.6\mathrm{.}6$ and $6\mathrm{.}7).$

What activities are on the critical path $($Fig$.6\mathrm{.}8)?$

What is the project duration?

Step $2$: Build the Gantt Chart $($Fig$.6\mathrm{.}11).$

Hangar Activity Detail

Task Name Duration cost Predecessors

$1$ Hangar Permitting $21$ days

$2$ Application $5$ days $275$

$3$ Process time $14$ days $02$

$4$ Pre$-$Order building materials $2$ days $03$

$5$ Hangar Permitting Complete $0$ days $04$

$6$ Hangar Ground Work $44$ days

$7$ Survey property $4$ days $505$

$8$ Set elevation $10$ days $2007$

$9$ Prepare site for concrete $30$ days $7008$

$10$ Construct tarmac and hangar

foundation $31$ days

$11$ Build concrete forms $10$ days $7009$

$12$ Install plumbing passing

through concrete $($Internal Sewer$)3$ days $20011$

$13$ Schedule code inspections $1$ day $05,12$

$14$ Order concrete $1$ day $012$

$15$ Pour concrete $10$ days $60012,14$

$16$ Concrete cured $7$ days $015$

$17$ Order specialty equipment $2$ days

$18$ Compressors and air systems $1$ day $12505$

$19$ Crane and lift equipment $1$ day $7505$

$20$ Hangar Groundwork Complete $0$ days $016$

$21$ Hangar Assembly $105$ days

$22$ Assemble Frame $40$ days $150016,19$

$23$ Install Crane $7$ days $30022$

$24$ Assemble outer structure $30$ days $30023$

$25$ Install Hangar Door $14$ days $30023$

$26$ Install electrical systems $30$ days $75022$

$27$ Install low voltage systems $30$ days $85022$

$28$ Install plumbing systems $28$ days

$29$ Air systems $24$ days $80018,24$

$30$ Water systems $24$ days $65018,24$

$31$ External Sewer systems $24$ days $100024$

$32$ Connect to outside sources $4$ days $550$

$24,25,26,27,$

$29,30,31$

$33$ Finish inside areas $15$ days $27532$

$34$ Hangar Assembly Complete $0$ days $033$

$35$ Open House $1$ day $034$