Using the normal schedule, given Activity 3001 and the relationship with Activity 4001. what is indicated?

The description "partially concurrent, with Activity 4001 starting 15 days after the start of Activity 3001" accurately defines a Start-to-Start (SS) relationship with a 15-day positive lag (SS+15). In this relationship, the start of the successor activity (4001) is dependent on the start of the predecessor activity (3001). The activities overlap for a portion of their durations, hence they are partially concurrent. The 15-day lag dictates the delay between the start of the predecessor and the start of the successor.

A. The activities are not independent; a specific time-based dependency is described. The mention of Activity 5001 is an irrelevant distractor.
C. "Sequential" typically implies a Finish-to-Start relationship, not the concurrent one described. "Starting 15 days earlier" would imply a negative lag or lead.

1. AACE International

Recommended Practice No. 10S-90

Cost Engineering Terminology

(June 20

2019)

Page 63. Defines "Lag" as "A specified

fixed duration of time between two activities."

2. AACE International

Skills & Knowledge of Cost Engineering

6th Edition

(2015)

Section 2.3.2.2

pp. 138-139. Describes the four relationship types

including Start-to-Start (SS)

where activities can be performed concurrently.