(I) Five Characteristic of

Repetitive Activities

1

FIVE CHARACTERISTICS

OF REPETITIVE ACTIVITIES

Modeling Repetitive Activities

Presented by

Chachrist Srisuwanrat

2008

(I) Five Characteristic of

Repetitive Activities

2

CHARACTERISTICS OF

REPETITIVE ACTIVITIES

1. Deterministic and Non-Deterministic Duration

Activities

2. Typical and Non-Typical Activities

3. Repetitive and Non-Repetitive Activities

4. Resource-Sharing Activities

5. Hard and Soft Logic Dependencies

(I) Five Characteristic of

Repetitive Activities

3

1) Deterministic and Non-

Deterministic Duration Activities

A1

A2

A3 B3

B1

B2

1 2 3 4 5 6 7 8 9 10

3 2 1

Unit

C3

C3

C2

A1

A2

A3 B3

B1

B2

1 2 3 4 5 6 7 8 9 10

3 2 1

Unit

C3

C3

C2

A1

A2

A3 B3

B1

B2

1 2 3 4 5 6 7 8 9 10

3 2 1

Unit

C3

C3

C2

Idle Time

WHAT IS THE IDLE TIME FOR EACH ACTIVITY?

HOW MANY DAYS SHOULD ACTIVITIES BE DELAYED?

ARE YOU CONFIDENT WITH YOUR DECISION?

(I) Five Characteristic of

Repetitive Activities

4

2) Example of Typical and Non-

Typical Repetitive Activities

A1

A2

A3 B3

B1

B2

Time 1 2 3 4 5 6 7 8 9 10 (a) Typical Activities

Time 1 2 3 4 5 6 7 8 9 10 (b) Non-Typical Activities

Unit

3

2

1

Unit

3

2

1

C3

C1

C2

A3

A1

A2

B3

B1

B2

C3

C1

C2

(For examples, work amounts, production rates, crew sizes)

(I) Five Characteristic of

Repetitive Activities

5

3) Examples of Repetitive and

Non-Repetitive Activities

A B

C2

Time 1 2 3 4 5 6 7 8 9 10

(a) Production Diagram for the case

activity only exists in the first unit

Time 1 2 3 4 5 6 7 8 9 10

(b) Production Diagram for the case

sub-activities does not exist in all units

Unit Unit

3

2

1

D3

D1

C2

A3

A1

A2

B3

B1 C1

C2

D3

D1

D2

C1

D2

3

2

1

(I) Five Characteristic of

Repetitive Activities

6

4) Resource-Sharing Activities

Two activities sharing the

same resource

Two sub-activities (same

activity) sharing the same

resource

Sharing resource concurrently

or not concurrently

(I) Five Characteristic of

Repetitive Activities

7

5) Example of Hard and Soft Logic

Dependencies

A1

A3

B1

B3

C1

A2 C2

C3

D1

D2

D3

E1

E2

E3

Time (months) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Switching the order between E2 and E3

Units 3 2 1

(I) Five Characteristic of

Repetitive Activities

8

5) Example of Soft Logic

Dependencies (Cont.)

A1

A3

B1

B3

C1

A2 C2

C3

D1

D3

D2

E1

E3

E2

Time (months) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Switching the order between units 2 and 3

Units 3 2 1

For example, housing projects (e.g., House ID1, House ID2, House ID3).