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 |