Probability

Entropy

Weights

Subsystem risk entropy

Power systems

0.375

Ha = 0.3678

= 0.6065

HP = 0.6502

0.375

Hb = 0.3867

= 0.6065

0.250

Hc = 0.3467

= 0.5587

Transportation systems

0.167

Ha = 0.2986

= 0.5456

HT = 0.4669

0.167

Hb = 0.2986

= 0.5465

0.667

Hc = 0.2703

= 0.5119

Communication system

0.286

Ha = 0.3579

= 0.5983

HC = 0.3302

0.000

Hb = 0

= 0

0.714

Hc = 0.2403

= 0.4902

Water supply system

0.444

Ha = 0.3604

= 0.6003

HW = 0.6312

0.333

Hb = 0.3662

= 0.6051

0.222

Hc = 0.3342

= 0.5781

Drainage system

0.444

Ha = 0.3604

= 0.6003

HD = 0.6312

0.222

Hb = 0.3342

= 0.5781

0.333

Hc = 0.3362

= 0.6051

Gas supply system

0.500

Ha =0.3466

= 0.5887

HG = 0.6037

0.200

Hb = 0.3219

= 0.5674

0.300

Hc = 0.3612

= 0.6010