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DNV-OSS-121 Classification Based on Performance Criteria Determined from Risk Assessment Methodology

Sec.4: Verification, Maintenance of Class

SECTION 4
Verification, Maintenance of Class

Sec.4
A. General

Sec.4
A 100   Introduction

Sec.4
B. In-Service Verification Scheme for
Maintenance of Class

Sec.4
B 100   General

The scheme will include:

—	review of the selected safety-critical elements and performance standards, particularly with respect to: — changes in operational requirements — modifications planned or performed — knowledge accumulated during operation of the scheme.
—	continuing and updated work plan and schedule for the verification work
—	documented results of verification work including any identified remedial actions or other need for change.

Sec.4
B 200   Review of safety-critical elements

Sec.4
B 300   Verification scheme

The extent of verification work will be determined based on a review of the operator's own maintenance arrangements, including review of:

—	maintenance and inspection objectives and management
—	competency of personnel
—	planning, scheduling and reporting tasks
—	inspection intervals
—	inspection and maintenance methods
—	type, accuracy and condition of equipment used
—	systems for planning and recording.

Once the level of maintenance and testing has been reviewed, the content of the verification scheme will be tailored as necessary to provide assurance that safety-critical elements meet the performance standards. Activities under the scheme will consist of an appropriate combination of:

—	physical examination
—	testing of systems and or components
—	audit of activities and procedures
—	review of inspection records.

Sec.4 B
302   The content of the operator's maintenance and inspection plan is a key element in the verification scheme. Therefore, any revision to the maintenance and inspection plan shall be notified to DNV for review and approval. DNV will update or revise the verification scheme as necessary to reflect such changes to the maintenance and inspection plan.

Sec.4 B
303   Verification activities shall be undertaken as and when appropriate according to the verification scheme. This may be on a continuous basis dependent upon the actual safety-critical elements, and the operator's own maintenance and inspection plan.

Sec.4 B
304   Based on indications and results, the verification scheme may be modified to include greater or lesser level of activities as necessary to ensure the ongoing performance of safety-critical elements.

Sec.4 B
305   Results and status of verification tasks will be documented within the scheme itself and through annual verification reports. The reports may in turn be used as documentation for other obligatory or regulatory requirements.

Sec.4 B
306   The operator is expected to co-operate with the application of the verification scheme, through timely provision of adequate information and access to all facilities as necessary to fulfil the verification tasks.

Sec.4 B
307   Necessary remedial measures with associated conditions of class and time scales will be notified to the operator or owner and recorded within the verification scheme.

Sec.4 B
308   Failure to effect remedial measures within the given time scales or obstruction of execution of the verification scheme may result in suspension or withdrawal of class.