Blog Post 02: Dry Dock Planning — Avoiding the 20% Cost Overrun
Title: The Superintendent's Guide to Dry Dock Control: Avoiding the 20% Cost Overrun
Target Audience: Technical Superintendents, Fleet Managers, Shipowner Directors, DPA / Compliance.
Core Keywords: Dry Dock Planning, Dry Dock Supervision, Cost Overrun, Scope Creep, Earned Value Management, EVM, Work List Control, Dry Dock Report, Off-Hire, Shipyard Coordination.
The Scope Creep Problem
A dry dock is the single most expensive planned maintenance event in a vessel's life cycle. Industry data consistently shows that dry dock projects overrun their initial budget by 15–25% — not due to unforeseeable emergencies, but due to a structural problem: uncontrolled work list expansion.
The pattern is familiar to every technical superintendent:
- The initial work list is submitted to the shipyard for a quotation.
- Once the vessel is in dock, the shipyard identifies "additional findings" — steel renewals, valve replacements, coating issues — that were not visible during the pre-docking survey.
- Each finding is individually justifiable. Collectively, they push the budget past the approved baseline.
- The superintendent approves changes under operational pressure because the vessel is already in dock and off-hire clock is running.
- The final invoice is 15–25% higher than the original approval, and the variance is written off as inevitable.
It is not inevitable. It is a project control failure that structured dry dock management can prevent.
The Root Cause: Loose Work List Control
A dry dock work list is a living document. It will grow. The question is whether growth is managed against a known baseline with explicit approval gates.
The problem arises when:
- No baseline exists. The initial quotation is treated as an estimate rather than a budget baseline against which changes are measured.
- Contingency is not quantified. A 10% contingency line item is common, but it is rarely managed as a controlled reserve. Once it is absorbed by the first three changes, there is no mechanism to prevent further overspend.
- Change approval is verbal. Additional items are approved by phone or email during the superintendent's site visit, bypassing the formal change control process.
- Financial and physical progress are tracked separately. The superintendent knows the percentage of work complete, but cannot correlate it with the percentage of budget spent — until the final reconciliation.
Applying EVM to Dry Dock Control
Earned Value Management (EVM) is a PMBOK-standard methodology that integrates scope, schedule, and cost into a single tracking framework. It is widely used in shipbuilding and offshore construction projects, but rarely applied to routine dry docking. For a mid-size shipowner, it is the single most effective tool for preventing cost overrun.
The three core metrics are:
| Metric | Definition | What It Tells You |
|---|---|---|
| Planned Value (PV) | Budgeted cost of work scheduled | What should have been spent by this date |
| Earned Value (EV) | Budgeted cost of work performed | What has actually been accomplished |
| Actual Cost (AC) | Actual cost incurred so far | What has really been spent |
From these, two variance indicators give you real-time control:
- Cost Variance (CV = EV − AC): Negative CV means you are spending more than the value of work completed. You are over budget.
- Schedule Variance (SV = EV − PV): Negative SV means you are behind schedule relative to the plan. Work is taking longer than estimated.
These indicators are reviewed in every dry dock progress meeting, not as a back-office exercise but as the basis for go/no-go decisions on additional work items.
Example:
A dry dock has a budget baseline of 500,000 EUR and a planned duration of 14 days. At day 10:
- PV = 380,000 EUR (planned spend by day 10)
- EV = 340,000 EUR (work completed is worth 340,000 at budgeted rates)
- AC = 420,000 EUR (actual spend to date)
CV = 340,000 − 420,000 = −80,000 EUR (over budget)
SV = 340,000 − 380,000 = −40,000 EUR (behind schedule)
The superintendent now has an objective signal: the dry dock is over budget AND behind schedule, likely due to additional work that was added without a corresponding budget increase. The corrective action — stop additional work, request a formal change order with cost and schedule impact, or accept the variance consciously — is taken at day 10, not at final invoice.
Pre-Docking: The Work That Saves You Money
Effective dry dock control starts before the vessel enters the shipyard. The pre-docking phase should include:
1. Comprehensive Pre-Docking Survey. A physical inspection of the vessel by an independent technical team (the Dry Dock Superintendent) before the work list is finalised. This identifies the majority of "additional findings" before the quotation, reducing the scope gap between estimate and execution.
2. Baseline Work List with Priorities. Every work item is classified:
- Mandatory: Class requirement, statutory, safety-critical. Must be done.
- Recommended: Operational improvement, planned renewal. Should be done if budget allows.
- Optional: Desirable but deferrable.
3. Quantified Contingency. A contingency reserve (typically 10–15% of the baseline budget) is established and managed through formal change control. The superintendent does not have authority to approve changes that consume contingency without documented justification.
4. Shipyard Bid Comparison. At least three shipyard quotations are evaluated against the same work list. The comparison is on total cost, not unit rates — a shipyard with higher day rates but higher productivity can be cheaper overall.
During Docking: Supervision and Change Control
Once the vessel is in dock, the Dry Dock Superintendent is the owner's on-site representative, responsible for:
- Daily progress verification against the work list.
- EVM tracking with weekly CV/SV reporting to the owner.
- Formal change control: any additional work beyond the baseline requires a signed variation order with cost and schedule impact assessed before approval.
- Quality inspection at each milestone: steel work witness, coating inspection, valve testing, machinery alignment.
- Permit coordination: hot work, confined space, height work, isolation — all managed through a documented permit-to-work system aligned with ISM Code requirements.
The Dry Dock Report: Your Terminal Deliverable
The dry dock is not finished when the vessel leaves the dock. It is finished when the Dry Dock Report is delivered. This report is the terminal deliverable of the project and should contain:
- Executed work list with status per item.
- Variation orders log with cost and schedule impact.
- EVM final report: final CV and SV against baseline.
- Equipment certificates and warranty documentation.
- Class survey reports and statutory certificate updates.
- Photographic evidence of key milestones.
- Financial close-out: final cost versus approved budget, with variance explanation.
This report is the evidence base for the next dry dock cycle, the Class file, and the owner's asset register.
Atlantech Marine's Methodology: Plan, Supervise, Close
Our dry dock management methodology is built on three phases:
Plan: Pre-docking survey, baseline work list, quantified contingency, shipyard selection support, risk assessment.
Supervise: On-site Dry Dock Superintendent, daily progress control, EVM tracking, formal change control, quality and safety oversight.
Close: Dry Dock Report with complete technical and financial closure, evidence package for Class and statutory compliance, lessons learned for the next cycle.
This methodology does not eliminate scope growth — no dry dock stays exactly on the original work list. But it ensures that every change is visible, costed, approved against a known baseline, and documented. The result is a controlled variance rather than a 20% surprise.
Need to plan a dry dock? Submit a service request or contact our team for a pre-docking consultation.
Atlantech Marine — Dry dock planning and supervision with EVM control, for mid-size shipowners. Based in Malta. Operating across the Mediterranean and West Africa.