Dynamic Minimum Lag Relationship - Construction Project Scheduling and Control - page 331

SIMILARITY BETWEEN THE DML CONCEPT AND THE LINEAR
SCHEDULING METHOD (LSM)
The DML relationship is similar to the LSMmethod 2 in maintaining a distance or time
buffer (see Figure 12.2a), but they are not the same. There are two main differences:

1. LSM is a different scheduling method from CPM and cannot be implemented
in network scheduling or use CPM calculations. DML is just a logic relation-
ship that is fully compatible with CPM calculations and network scheduling.

Minimum lag

A

B

Time

(a)

5

0,10
A
10

5,11

B
6

(b)

1

0,10 5,11

A
10

B
6

(c)

1

0,10 5,11

A
10

B
6

1

(d)

Figure 12.2 Two overlapping activities represented in LSM graph and three different
PDM networks (SS, FF, and SS + FF), all leading to the same dates. Activities are
assumed to be contiguous.

2 Refer to the linear scheduling method (LSM) discussed in Chapter 11.