Below is information about a project to implement a new manufacturing cell to assemble personal digital assistant devices.

ACTIVITY	DURATION	PREDECESSORS	ES	EF	LS	LF	TOTAL SLACK
A. Design Process Requirements	2	---
B. Benchmark Competitors Processes	4	A
C. Prepare Benchmark Report	1	B
D. Design Process and Layout	2	A
E. Finalize design and setup manf. Cell	2	C, D
F. Select and train operators	1	D
G. Pilot test new process	2	E, F
H. Finalize process design	1	G

Draw a network diagram.

Identify the ES, EF, LS, LF and slack times in the table using the critical path method.

During the initial stages of the project, a new set of requirements were discovered that would extend the process and layout design activity from 2 to 6 months. The operations group which initiated these requirement changes argues that they would not impact the project duration. Is this true? Justify your answer.