MP092 New Planned Maintenance methodology

Proposer Darren Robbins
Lead Analyst Emmanuel Ajayi
Date raised 22/10/2019
StageRefinement Process
Implementation date Unknown
Latest update The Refinement Consultation has been issued as of 06 July 2020 with responses due by 17:00 on 7 August 2020.

What is the issue?

In April 2019 the DCC began a trial of a new approach regarding the delivery of Planned Maintenance. The new approach sought to categorise planned changes as either low or high impact, based upon a risk-based methodology. It also amended the timings with which Planned Maintenance was scheduled and implemented.
Whilst the SEC is silent on the methodology for scoping Planned Maintenance, it does set out when the Maintenance should occur and the timescales around publishing Maintenance schedules (Sections H8.3 and H8.4). In order to trial the new approach, the SEC Panel granted the DCC a derogation against these provisions for six months (later extending for a further three months until February 2020). The Panel requested the DCC report on progress to the Operations Group.
In July, the DCC reported the trial had been a success and, following a final report to the Operations Group, intended to raise a Modification Proposal to formalise the new approach.

The full Problem statement can be found here.

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What is the solution?

Change the SEC to incorporate the new approach

Who is impacted?

All SEC Parties

What SEC documents are affected?

Section H 'DCC Services'


22 Oct 2019
Draft Proposal Raised
15 Nov 2019
Draft Proposal converted to Modification Proposal
18 Nov 2019
Preliminary Assessment requested from the DCC
01 Jul 2020
Modification discussed with Working Group

Modification documents

MP092 Refinement Consultation Responses
MP092 Preliminary Assessment
MP092 Refinement Consultation
DP092 Problem Statement
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