Planning, scheduling and managing installation projects
Break the work down, then sequence it
Planning starts with a work breakdown structure - plant removal or relocation, pipework and containment, electrical, controls, pressure testing, insulation, commissioning, snagging, handover. From that you build a programme (typically a Gantt chart) showing dependencies, durations, resources, procurement lead times and inspection hold points.
Critical path and float
The critical path is the longest chain through the network; any delay on it delays completion. Float (slack) is the spare time on non-critical activities, and it is the project manager's buffer for re-sequencing. Questions frequently test whether a candidate can add up parallel chains and identify total float.
Managing on site
Manage through method statements and RAMS briefings, permits, coordination meetings with other trades, agreed access and lifting slots, a risk register, and formal change control for variations. Progress must be measured objectively against the programme (percentage complete, earned value, S-curves), not on impressions. Keep a live snag list, define practical completion, and plan handover documentation from day one rather than at the end.
Worked example
Chain A: design 3 days, procurement 4 days, install 2 days = 9 days. Chain B (runs in parallel after design): procurement 3 days, install 2 days = 8 days. Total float on Chain B is 9 − 8 = 1 day. If procurement on Chain B slips by 2 days it becomes critical and moves the completion date.
Traps
Confusing float with contingency money; ignoring equipment lead times; treating commissioning as a task that can be compressed indefinitely; planning without a temporary cooling or plant-down strategy for occupied buildings.