LHC intervention scheduling with the Work Acceptance Tool

LHC intervention scheduling with the Work Acceptance Tool

K. Foraz, CERNApril 14, 2011

ARW2011, Cape Town, South Africa

One of the first images from CMS, showing the debris of particles picked up in the detector's calorimeters

ARW2011 - K. Foraz 2

OutlineIntervention scheduling

• The game field, the rules and the players

• First year problematic

• Solution implemented

• First results

• Future

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Introduction

Optimize programmed stops in order to ensure long and reliable operation

Nb of days/year

Beam ON & set-up

365days

Nb of days of

Program. Stops

Nb of days for

recovery

Nb of days for

Beam set-up

Nb of days of

Failure

=

- - - -

What has been done / not during Stops

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The game field

• Machine:– 27km circumference– Underground (up to 100m)– 8 sectors and associated service areas

12

3 654

78

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The game rules• LHC has a cycle of ~ 4 years– ~ 3 years of operation– ~ 1 year of Long Shut-down to consolidate, upgrade and perform

full maintenance of the different systems.

• Operation years:– Find the best compromise between maintenance and beam ON

time windows

• Xmas break of 11 weeks• 6 Technical Stops of 4 days

J MF A M JJ A S O N DN D J F

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The players

• LHC Machine Committee (the referee)

• Coordination teams– Program. Stops Coord.

– Tech. Infrastr. Operation Com.– Operation

– Safety Coordination

• Groups

LMC

PSCOP

SCTIOC

CryoEL

…CV

BI

RF

EL

Mag. Conv.

Coll.QPS

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First year problematic

Groups

TIOC

StopsCoordination

OP

1. Maintenance plan (CMMS, excel..) 2. Request (mail, SharePoint..)4. Safety procedures6. Request access

SafetyCoordination

3. Approval in TIOC meetings

3. Approval (if needed through LMC) Prepare logistics Schedule 5. Approval

(fire permits, DIMR…)

7. Accept &grant access

Just the beginning of the process

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First year problematic• Information partially shared

– The risk that authorizations were not given by the adequate coordination team was high

– Cross-check between coordination teams was time consuming

• Multiple edition of the same information– The effort of groups to announce & edit information to the different

coordination teams and different systems was heavy

• Access time– Average of 20 minutes/person (guessing you have only one door to

access your worksite !!)• ~ 500 persons wanting to access - 2 operators granting access

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Solution implemented: WAT !

Work Acceptance ToolA gentle start

One database grouping all the interventions

Approval process through the existing Electronic Document Handling

linked to the Access control system DB

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Workflow

For any intervention in the machine– Requests must be

• Technically approved• Scheduled• Prepared from a safety point of view

– Personnel must be habilitated

Request

Technical approval

Schedule

Safety

Execution

Close

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Workflow

1. Groups submit a request– What

• Type of intervention• System

– Who• Responsible• Participants• Number of teams• Number of participants/area

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Workflow

– When• Constraints• Duration• Period

– Locations– Safety

• Risks associated with the activity• Lock-out needed

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Workflow2. Technical approval

– If needed through LHC Machine Committee– Infrastructure: discussed in TIOC (Tech. Infrastr. Operation Committee)– Machine: discussed during preparation meetings with operation group– Layout database modified if needed through ECR (configuration

management)

3. Schedule– Work Acceptance Tool is providing a Gantt view– List import & export Schedule

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Workflow

4. Safety– Safety forms automatically prepared, send to the Safety

database and the link is kept (Fire Permit, DIMR..). Approval status send back to WAT

5. Execution – (RP survey prior to access)– Link with access database: only persons who have an authorized

activity in a specific location and at a certain time can access– Form for comments

6. Close

List, filters…to retrieve activities, make statistics

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WAT: Integration with existing systems

EDH Layout Database

ADAMS

Foundation

Access Control (person/place/time)

LHC LocationsAccess Points

NotificationsSignatures

Persons, Organic Units

ExcelSchedule Export,

Bulk Update (Upload)

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EDH

Safety forms

WAT


First resultsWAT in operation since December 2010• Only fully authorized activities can be performed

• Access time: 15minutes gained/access & no operators needed

• List of interventions available for operation

• Start to build up the history of interventions

• Feed-back is very good– Efficient, eases access, gives overview of what’s going on at a location/for a

group/ for a system…

Better control&

Increase productivity

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WAT next

• Within WAT project– Link activities to equipment rather than locations• Accurate picture of the equipment history• Accurate picture given to Operation after a stop

– Link WAT with Computer Maintenance Management System

WAT Layout DatabaseLHC Locations

Access Points

LHC Equipment

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WAT next - IMWGMoreover, same equipment groups are also intervening in the LHC

experiments, as well as in injectors Intervention Management Working Group set-up

• Goal: One single database of intervention data

Create a unique repository for interventions

One workflow engineStandardize practices where possible and desirable

A web tool to input work declarations to plan, schedule, prepare and coordinate all activities, anywhere

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Thank youQuestions, comments,

suggestions ?

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LHC intervention scheduling with the Work Acceptance Tool

Documents

Transcript of LHC intervention scheduling with the Work Acceptance Tool