Effectiveness of Controls
References: AS2885.6 - in general AS2885.6 Appendix E - Effectiveness of procedural controls AS2885.1 Appendix E - Resistance to penetration
Did the Part 6 Committee consider a control assessment matrix based on (a) Reduction of severity/frequency and (b) how well it's implemented to get a rating?
(Peter Tuft) No, this suggestion was not considered during development of Part 6, and if it had been it could only be guidance information. However there is nothing to stop users developing such tools for themselves (and if you come up with a good one please share it around the industry).
What are some ways that control effectiveness can be demonstrated? Would this be evidence based?
(Peter Tuft) Short answer - yes, should be evidence-based to the extent possible with the data that can be reasonably accessed.
Longer answer: For physical controls this is an engineering question that in most cases can and should be based on evidence such as calculations (or simple logic, e.g. cover exceeds maximum depth of deep ripping). Sometimes data is lacking and some element of judgement is required (e.g. resistance to drilling equipment). For procedural controls, effectiveness is addressed by Appendix E of Part 6, which is based on the 2012 version of Appendix E to AS 2885.1 but updated with the aid of work from EPCRC RP4.
Please clarify to what extent Part 1 is still valid for existing pipelines? eg benchmarking validity of threat controls.
(Peter Tuft) The question is a little unclear. Note that all information on risk controls is now in Part 6. Part 1 is not retrospective and does not need to be applied to existing pipelines. However the periodic operational review SMS requires that every threat be reviewed and some of the information in Part 1 might be helpful for that purpose, particularly Appendix E on resistance to penetration.