Activity

HEP

Uncertainty

Lower bound

Upper bound

1. Draw up work

1.1 Planning work order

9.73E−02

6.21E−02

1.53E−01

1.2 Conducting work permit system

6.56E−02

3.81E−02

1.23E−01

1.3 Equipment diagnostics

7.24E−02

4.62E−02

1.23E−01

1.4 Risk assessment of each planned activity

7.21E−02

5.51E−02

1.13E−01

1.5 Tool box meeting before startup of each work

9.88E−02

6.3E−02

1.32E−01

1.6 Documenting the permit to work system

8.4E−02

5.36E−02

1.44E−01

2. Mobilization

2.1 Crane sea-fastening

9.03E−02

5.34E−02

1.55E−01

2.2 Survey Equipment Installation

9.48E−02

6.05E−02

1.48E−01

2.3 ROV system Installation

8.87E−02

5.15E−02

1.52E−01

2.4 Providing side effecting equipment

1.08E−01

6.12E−02

1.79E−01

3. Positioning the vessel in the site

3.1 Apply GPS and thrusters to being stable in the site

1.05E−01

5.71E−02

2.11E−01

4. Start-up survey system

4.1 Check beacon, multi beam, USBL to ensure that they work property

9.71E−02

5.23E−02

1.92E−01

4.2 Connect the beacon and underwater gyro cable to the load

9.92E−02

6.77E−02

2.11E−01

5. Prepare Lifting Equipment

5.1 Connect properly wire and belts to the load

8.18E−02

4.75E−02

1.46E−01

5.2 Check if wires/belts are out of order or not

1.01E−01

6.08E−02

1.58E−01

5.3 Check the safety factors and breaking load for wires and working load for belts

8.00E−02

5.24E−02

1.82E−01

6. Lower support down

6.1 Check the speed of lowering process specially near the surface

1.27E−01

6.11E−02

2.11E−01

7. Check position of support by Survey Team

7.1 Monitor the load transitional and rotational position in the sea

1.09E−01

5.15E−02

1.78E−01

8. Check position of support by ROV team

8.1 ROV takes the fix point for validation of the load position

1.09E−01

5.15E−02

1.78E−01

9. Release the support on seabed

9.1 Check the position, if it is ok release the load

1.36E−01

6.99E−02

2.18E−01