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[]
[]
[]
[null,null,null,{"$f":"E17","v":"INSERT PROJECT TITLE"}]
[]
[]
[]
[]
[]
[null,null,null,null,null,"CHAZOP STUDY REPORT"]
[]
[]
[]
[]
[null,null,"Project Number",null,"INSERT PROJECT NUMBER"]
[]
[null,null,"Project Title",null,"INSERT PROJECT TITLE"]
[]
[null,null,"Client Name",null,"INSERT CLIENT NAME"]
[]
[null,null,"CHAZOP Date(s)",null,"INSERT CHAZOP DATE(S)"]
[]
[null,null,"CHAZOP Type",null,"System CHAZOP"]
[]
[null,null,"Project Scope and Objectives",null,"BRIEF OUTLINE OF PROJECT SCOPE AND CHAZOP OBJECTIVES"]
[]
[null,null,"CHAZOP Facilitator",null,"INSERT CHAZOP FACILITATOR NAME"]
[]
[null,null,"CHAZOP Scribe",null,"INSERT CHAZOP SCRIBE NAME"]
[]
[]
[null,"DOCUMENT CONTROL"]
[null,null,null,null,null,null,"Approvals"]
[null,"Rev","Description",null,null,"Date","Prepared","Checked","Disc Approved","Project Approved"]

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[]
[null,null,null,"File Usage Instructions"]
[]
[]
["1.0","Introduction - Safety in Design Requirements"]
[]
[null,"Purpose:"]
[null,"The importance  of electrical, electronic and programmable electronic systems in safety related applications, is steadily growing. If the control system is sufficiently complex for the facility, it may be useful to consider this system in a separate HAZOP (sometimes referred as a CHAZOP; the ‘C’ prefix used to indicate computer based – both control and protective) or as a discrete component of a more general HAZOP. CHAZOP must be looked at as three distinctly different, but consecutively run stages, including, System, Loop and Sequence CHAZOP. Each stage involves a systematic and critical review using guidewords similar to those used in HAZOP. \n\nAll projects with control systems components must have a CHAZOP unless specified otherwise in the Project Documentation."]
[]
[null,"Timing:"]
[null,"Starting the CHAZOP. typically requires that the control system design meets the requirements set out in the control system functional specification and that (i) the HAZID is completed and (ii) a design review and process HAZOP has been completed and all outstanding items are actioned. \n"]
[null,null,"·     The System CHAZOP is undertaken prior to ordering the Automation / Control / Protection system equipment."]
[null,null,"·     The Loop CHAZOP is undertaken when a few critical instrument loops have been configured and certainly before all loops design are completed. This will identify the requirements for the entire system and set standards for further design."]
[null,null,"·     The Sequence CHAZOP is undertaken, similar to Loops, once a few sequences within a system have been documented in the functional specification. This will identify particular requirements of the system and set standards for further design."]
[]
[null,"Note: Unless stated otherwise, the Consultant/Contractor is required to comply with the requirements set out in Pr8187 - Safety in Design Procedure."]
[]
[1.1000000000000001,"Required Documentation"]
[]
[null,"The following list outlines the documentation typically required for CHAZOP workshops:"]
[null,null,"•         Piping & Instrumentation Diagrams (P&IDs)"]
[null,null,"•         Process Control Narrative (PCN) "]
[null,null,"•         Functional Specification (FS) "]
[null,null,"•         Instrument loop diagrams"]
[null,null,"•         Single line diagrams (SLD) "]
[null,null,"•         Comissioning plans & procedures"]
[null,null,"•         Electronic CHAZOP Template"]
[]
[1.2,"Required Attendees"]
[]
[null,"In accordance with document Pr8187 Appendix B, the team composition for the workshop must be agreed with the Project Manager and should be reflected in the Attendance sheet provided. It normally, as a minimum, must include:"]
[null,null,"•         Independent Facilitator supported by a Scribe"]
[null,null,"•         Project Manager(s) - UW and Contractor"]
[null,null,"•         Designers (e.g. process and controls & instrumentation engineers)"]
[null,null,"•         Independent technical specialist, as required"]
[null,null,"•         UW Operations representative"]
[null,null,"•         UW Control System Maintenance representative"]
[]
[null,"*Note: The above listed representatives is a guide and can be subjected to change depending on the nature and scope of works with approval from Project Manager."]
[]
[1.3,"File Usage"]
[]
[null,"The spreadsheets contained in this file provide templates for the implementation of safety in design using the CHAZOP process. The following table provides a list of sheet to be used and their usage instructions."]
[]
[null,"Step No.","Name",null,"Instructions"]
[null,1,"Title Page and Instructions Page",null,"The title page should be filled in with project details prior to beginning the CHAZOP. The Instructions should be read and filled in prior to beginning the CHAZOP."]
[null,"2.","Agenda & Attendance and Drawings ",null,"Records the attendance of the members attending the CHAZOP. Complete this attendance sheet prior to beginning the the CHAZOP. The drawings required for the workshop should be listed in the Drawings page and relevant minutes sheets should be highlighted."]
[null,"3.",1,null,"This spreadsheet is for the recording of the CHAZOP minute for System 1, under review. Lists contained within the 'Deviation' columns should be utilised to select the correct guidewords in accordance with the CHAZOP Guidewords page. If more rows are required during recording the 'Add Row' button on the top right hand side of the sheet should be clicked to add an additional row at the end of the page. To create a new page the \"Add Node\" button present on the top right hand side of the sheet should be used and the new page named to the Sequence number under review."]
[null,"4.","AS1.1",null,"This sheet should be used as a post CHAZOP workshop activity for outlining the issues which need to be acted upon and the action closure requirements. "]
[]
[null,"The following table provides a list of templates and and a description of their contents. Please note that the template sheet tabs are in grey should not be altered anytime during the CHAZOP as they form the basis for various functions."]
[]
[null,"No.","Name",null,"Instructions"]
[null,"1.","Minutes Template",null,"This sheet provides a template for the recording of the CHAZOP minutes. This sheet should not be altered during the CHAZOP. Recording of the CHAZOP minutes should be conducted on the sheet named \"1\"."]
[null,"2.","Action Sheet Template",null,"This sheet provides a template for the creation of action sheets. This sheet should not be altered during the CHAZOP."]
[null,"3.","Guidewords",null,"This sheet provides a bank of all the CHAZOP guidewords referred to during the workshop. It should be printed and given to all attendees prior to the start of the CHAZOP for reference. This sheet is connected via lists to the main CHAZOP minutes template and all nodes pages and therefore should not be altered during the CHAZOP."]
[]
[null,"NOTE: The Consultant/Contractor is responsible for ensuring CHAZOP methodologies are applied properly and templates are used to ensure safe design."]

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[]
[null,null,null,"AGENDA & ATTENDANCE"]
[]
[]
["Date",null,{"$f":"DATE","v":"INSERT CHAZOP DATE(S)"}]
["Head Contractor Name"]
["UW Project No. & Name",null,{"$f":"PROJNUM&\" \"&PROJTITLE","v":"INSERT PROJECT NUMBER INSERT PROJECT TITLE"}]
["Location (Site)"]
["Meeting Number"]
[]
[]
["2.0","Proposed Agenda"]
[]
[null,2.1,"Safety Share"]
[null,2.2000000000000002,"Introductions and Welcome (check of attendance in accordance with Pr8187 - Appendix B)"]
[null,2.2999999999999998,"Review previous actions from SID workships"]
[null,2.4,"Overview of systems associated with the control system design "]
[null,2.5,"Custom breakdown structure for workshop discussion - System"]
[null,null,"2.5.1","Application of system guidewords"]
[null,null,"2.5.2","Capture significant outcomes"]
[null,2.6,"Other issues"]
[null,2.7,"Workshop closure"]
[]
[]
["3.0","Attendance"]
[]
[null,"The following table provides a list of people attending the workshop and is to be signed by every attendee."]
[]
[null,"Name",null,"Company",null,"Position",null,"Contact",null,"Signature"]

{"sheet":"Drawings","index":3,"n_rows":31,"n_cols":9,"rows_kept":31,"cut":false,"hidden":false,"merged":[[30,1,30,2],[27,1,27,2],[28,1,28,2],[29,1,29,2],[30,6,30,7],[29,6,29,7],[28,6,28,7],[27,6,27,7],[30,3,30,5],[29,3,29,5],[28,3,28,5],[27,3,27,5],[24,1,24,2],[25,1,25,2],[26,1,26,2],[26,6,26,7],[25,6,25,7],[24,6,24,7],[26,3,26,5],[25,3,25,5],[24,3,24,5],[21,1,21,2],[22,1,22,2],[23,1,23,2],[23,6,23,7],[22,6,22,7],[21,6,21,7],[23,3,23,5],[22,3,22,5],[21,3,21,5],[18,1,18,2],[19,1,19,2],[20,1,20,2],[20,6,20,7],[19,6,19,7],[18,6,18,7],[20,3,20,5],[19,3,19,5],[18,3,18,5],[16,1,16,2],[17,1,17,2],[15,8,15,9],[17,6,17,7],[16,6,16,7],[15,6,15,7],[17,3,17,5],[16,3,16,5],[1,3,2,7],[4,0,4,1],[4,2,4,10],[5,2,5,10],[6,2,6,10],[14,1,14,2],[15,1,15,2],[14,3,14,5],[15,3,15,5],[7,2,7,10],[12,1,12,10],[14,8,14,9],[14,6,14,7],[30,8,30,9],[29,8,29,9],[28,8,28,9],[27,8,27,9],[26,8,26,9],[25,8,25,9],[24,8,24,9],[23,8,23,9],[22,8,22,9],[21,8,21,9],[20,8,20,9],[19,8,19,9],[18,8,18,9],[17,8,17,9],[16,8,16,9]]}
[]
[null,null,null,"DRAWINGS"]
[]
[]
["Date",null,{"$f":"DATE","v":"INSERT CHAZOP DATE(S)"}]
["Head Contractor Name",null,{"$f":"IF(HEADCONTRACTOR=\"\",\"\",HEADCONTRACTOR)","v":""}]
["UW Project No. & Name",null,{"$f":"PROJNUM&\" \"&PROJTITLE","v":"INSERT PROJECT NUMBER INSERT PROJECT TITLE"}]
["Location (Site)",null,{"$f":"IF(LOCATION=\"\",\"\",LOCATION)","v":""}]
[]
[]
["4.0","List of Drawings"]
[]
[null,"The following table provides a list of drawings used during the workshop and their associated revision numbers. This table should be filled out prior to the workshop and be printed along with the guideword set. At the start of the workshop it should be distributed to each attendee for reference to the relevant P&IDs."]
[]
[null,"No.",null,"P&ID/Document Ref No.",null,null,"Revision No.",null,"Minutes Sheet Ref."]
[null,1]
[null,2]
[null,3]
[null,4]
[null,5]
[null,6]
[null,7]
[null,8]
[null,9]
[null,10]
[null,11]
[null,12]
[null,13]
[null,14]
[null,15]
[null,16]

{"sheet":"1","index":4,"n_rows":27,"n_cols":9,"rows_kept":27,"cut":false,"hidden":false,"merged":[[4,3,4,4],[4,6,4,8]]}
["CHAZOP Minutes Recording Sheet"]
[]
[]
[]
["SYSTEM:",1,"DESCRIPTION:",null,null,"P&ID/Doc Ref No.:"]
[]
["Ref No.","Deviation-Guideword","Cause","Consequence(s)","Existing Safeguards","Action Description","Action By","Response or Action Sheet Reference No.","Date Closed"]
[1,"Maintenance"]
[{"$f":"A8+1","v":2}]
[{"$f":"A9+1","v":3}]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[{"$f":"A26+1","v":20}]

{"sheet":"Minutes Template","index":5,"n_rows":27,"n_cols":9,"rows_kept":27,"cut":false,"hidden":false,"merged":[[4,3,4,4],[4,6,4,8]]}
["CHAZOP Minutes Recording Sheet"]
[]
[]
[]
["SYSTEM:",null,"DESCRIPTION:",null,null,"P&ID/Doc Ref No.:"]
[]
["Ref No.","Deviation-Guideword","Cause","Consequence(s)","Existing Safeguards","Action Description","Action By","Response or Action Sheet Reference No.","Date Closed"]
[1,"Standards"]
[{"$f":"A8+1","v":2}]
[{"$f":"A9+1","v":3}]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[{"$f":"A26+1","v":20}]

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[null,null,null,null,null,null,null,null,null,null,null,null,"Node Numbers","Item Reference Numbers"]
[null,null,null,"CHAZOP ACTION & RESPONSE SHEET",null,null,null,null,null,null,null,null,1,1]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$f":"M2+1","v":2},{"$f":"N2+1","v":2}]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$f":"M3+1","v":3},3]
[null,null,null,null,null,null,null,null,null,null,null,null,4,4]
[null,null,null,null,null,null,null,null,null,null,null,null,5,5]
["CHAZOP Date(s)",null,{"$f":"DATE","v":"INSERT CHAZOP DATE(S)"},null,null,null,null,null,null,null,null,null,6,6]
["Head Contractor Name",null,{"$f":"IF(HEADCONTRACTOR=\"\",\"\",HEADCONTRACTOR)","v":""},null,null,null,null,null,null,null,null,null,7,7]
["UW Project No. & Name",null,{"$f":"PROJNUM&\" \"&PROJTITLE","v":"INSERT PROJECT NUMBER INSERT PROJECT TITLE"},null,null,null,null,null,null,null,null,null,8,8]
["Location (Site)",null,{"$f":"IF(LOCATION=\"\",\"\",LOCATION)","v":""},null,null,null,null,null,null,null,null,null,9,9]
[null,null,null,null,null,null,null,null,null,null,null,null,10,10]
["Action Sheet Due Date",null,null,null,null,null,null,null,null,null,null,null,11,11]
[null,null,null,null,null,null,null,null,null,null,null,null,12,12]
["P&ID Refs.",{"$f":"IF(VLOOKUP(NODE, INDIRECT(\"'\"&NODE&\"'!\"&\"NODE_DETAILS\"),6,0) = \"\",\"\", VLOOKUP(NODE,INDIRECT(\"'\"&NODE&\"'!\"&\"NODE_DETAILS\"),6,0))","v":""},null,null,null,null,null,null,null,null,null,null,{"$f":"M13+1","v":13},{"$f":"N13+1","v":13}]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$f":"N14+1","v":14},{"$f":"N14+1","v":14}]
["SYSTEM:",1,null,"DESCRIPTION:",null,{"$f":"IF(VLOOKUP(NODE, INDIRECT(\"'\"&NODE&\"'!\"&\"NODE_DETAILS\"),3,0) = \"\",\"\", VLOOKUP(NODE,INDIRECT(\"'\"&NODE&\"'!\"&\"NODE_DETAILS\"),3,0))","v":""},null,null,null,null,null,null,15,15]
[null,null,null,null,null,null,null,null,null,null,null,null,16,16]
["Item Ref No.",1,null,"Sheet Ref No.",null,{"$f":"CONCATENATE(\"AS\",NODE,\".\",REF_NO)","v":"AS1.1"},null,null,null,null,null,null,17,17]
[null,null,null,null,null,null,null,null,null,null,null,null,18,18]
["1.0","Hazard Description",null,null,null,null,null,null,null,null,null,null,{"$f":"M19+1","v":19},19]
[null,null,null,null,null,null,null,null,null,null,null,null,20,20]
["No.","ITEM",null,"DETAILS",null,null,null,null,null,null,null,null,21,21]
[1.1000000000000001,"Deviation/Guideword",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),2,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),2,0))","v":"Maintenance"},null,null,null,null,null,null,null,null,{"$f":"#REF!+1","v":{"$error":"#REF!"}},{"$f":"#REF!+1","v":{"$error":"#REF!"}}]
[1.2,"Cause(s)",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),3,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),3,0))","v":""},null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[1.3,"Consequence(s)",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),4,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),4,0))","v":""},null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[1.4,"Existing Safeguard(s)",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),5,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),5,0))","v":""},null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
["2.0","Required Action(s)",null,null,null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
["No.","ITEM",null,"DETAILS",null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[2.1,"Action Description",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),6,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),6,0))","v":""},null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[2.2000000000000002,"Action By",null,{"$f":"IF(VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),7,0)=\"\",\"\",VLOOKUP(REF_NO,INDIRECT(\"'\"&NODE&\"'!\"&\"Minutes_Sheet\"),7,0))","v":""},null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
[null,null,null,null,null,null,null,null,null,null,null,null,{"$error":"#REF!"},{"$error":"#REF!"}]
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{"sheet":"Parking Lot","index":8,"n_rows":31,"n_cols":11,"rows_kept":31,"cut":false,"hidden":false,"merged":[[26,10,26,11],[15,10,15,11],[16,10,16,11],[17,10,17,11],[18,10,18,11],[19,10,19,11],[27,10,27,11],[28,10,28,11],[29,10,29,11],[30,10,30,11],[12,1,12,11],[20,10,20,11],[21,10,21,11],[22,10,22,11],[23,10,23,11],[24,10,24,11],[25,10,25,11],[30,1,30,2],[30,3,30,5],[30,6,30,7],[30,8,30,9],[14,10,14,11],[28,1,28,2],[28,3,28,5],[28,6,28,7],[28,8,28,9],[29,1,29,2],[29,3,29,5],[29,6,29,7],[29,8,29,9],[27,1,27,2],[27,3,27,5],[27,6,27,7],[27,8,27,9],[24,1,24,2],[24,3,24,5],[24,6,24,7],[24,8,24,9],[25,1,25,2],[25,3,25,5],[25,6,25,7],[25,8,25,9],[26,1,26,2],[26,3,26,5],[26,6,26,7],[26,8,26,9],[22,6,22,7],[22,8,22,9],[23,1,23,2],[23,3,23,5],[23,6,23,7],[23,8,23,9],[22,1,22,2],[22,3,22,5],[20,1,20,2],[20,3,20,5],[20,6,20,7],[20,8,20,9],[21,1,21,2],[21,3,21,5],[21,6,21,7],[21,8,21,9],[18,1,18,2],[18,3,18,5],[18,6,18,7],[18,8,18,9],[19,1,19,2],[19,3,19,5],[19,6,19,7],[19,8,19,9],[16,1,16,2],[16,3,16,5],[16,6,16,7],[16,8,16,9],[17,1,17,2],[17,3,17,5],[17,6,17,7],[17,8,17,9],[14,8,14,9],[15,1,15,2],[15,3,15,5],[15,6,15,7],[15,8,15,9],[1,3,2,7],[4,0,4,1],[14,1,14,2],[14,3,14,5],[14,6,14,7],[4,2,4,11],[5,2,5,11],[6,2,6,11],[7,2,7,11]]}
[]
[null,null,null,"PARKING LOT"]
[]
[]
["Date",null,{"$f":"DATE","v":"INSERT CHAZOP DATE(S)"}]
["Head Contractor Name",null,{"$f":"IF(HEADCONTRACTOR=\"\",\"\",HEADCONTRACTOR)","v":""}]
["UW Project No. & Name",null,{"$f":"PROJNUM&\" \"&PROJTITLE","v":"INSERT PROJECT NUMBER INSERT PROJECT TITLE"}]
["Location (Site)",null,{"$f":"IF(LOCATION=\"\",\"\",LOCATION)","v":""}]
[]
[]
["5.0","Parking Lot Issues"]
[]
[null,"The following table provides a list of drawings used during the workshop and their associated revision numbers. This table should be filled out prior to the workshop and be printed along with the guideword set. At the start of the workshop it should be distributed to each attendee for reference to the relevant P&IDs."]
[]
[null,"No.",null,"Issue",null,null,"Document Ref",null,"Referred to",null,"Minutes Sheet Ref."]
[null,1]
[null,2]
[null,3]
[null,4]
[null,5]
[null,6]
[null,7]
[null,8]
[null,9]
[null,10]
[null,11]
[null,12]
[null,13]
[null,14]
[null,15]
[null,16]

{"sheet":"Guidewords","index":9,"n_rows":38,"n_cols":3,"rows_kept":38,"cut":false,"hidden":false,"merged":[[25,0,37,0],[1,1,4,2],[7,0,24,0],[6,2,6,5],[7,2,7,5],[8,2,8,5],[14,2,14,5],[15,2,15,5],[16,2,16,5],[17,2,17,5],[18,2,18,5],[19,2,19,5],[20,2,20,5],[21,2,21,5],[22,2,22,5],[23,2,23,5],[9,2,9,5],[10,2,10,5],[11,2,11,5],[12,2,12,5],[13,2,13,5],[24,2,24,5],[25,2,25,5],[26,2,26,5],[27,2,27,5],[28,2,28,5],[34,2,34,5],[35,2,35,5],[36,2,36,5],[37,2,37,5],[29,2,29,5],[30,2,30,5],[31,2,31,5],[32,2,32,5],[33,2,33,5]]}
[]
[null,"CHAZOP SYSTEM GUIDEWORDS"]
[]
[]
[]
[]
["Category","Guidewords","Description"]
["Overview","Introduction","Usage - Integrity - Availability - Vulnerability - Control/protection - Maintainability"]
[null,"Standards","Equipment standards - Compatibility of equipment from different suppliers - Quality of installation, maintenance and housekeeping"]
[null,"System Communication","Speed, capacity, bandwidth, loading - Protocols/interfaces - Delays, Relative timing - Error detection/correction"]
[null,"Maintenance","Who maintains/operates - Permits to work - Training - Isolation procedures - Modification control - Start up/shutdown - Individual hardware units - Fault diagnosis - Status indication - Online requirement - Accessibility - Test facilities - Power supply checks - Spares (hot spare?) - Documentation - Equipment labelling (cabinets, cables, ect.) - Preventative maintenance"]
[null,"Earthing/isolation","Earthing (signal, static, power) - ELV/LV/HV separation - Surge protection (lighting) - Area classificatio/IS separation "]
[null,"Power Distribution","Voltage - Capacity/spare capacity - Discrimination - Inrush - Fault capacity - UPS?DC battery backup"]
[null,"Operability","Sufficient operator stations (start-up, emergency, engineer access) - Printers - Security - Effect of failures - Lighting (control & other rooms, emergency) - Layout/ergonomics - Communications (phonse, radio, intercoms, interference)"]
[null,"Trending","Historical - Archiving and retrieving - Independent for critical measurements"]
[null,"Alarms","Dedicated panel - Audible (control room, field, other) - Testing (methods, frequency, records) - Maintenance"]
[null,"Protective System","Have all required safety systems been identified (sensors, trip system, final elements e.g. pump starting)"]
[null,"Reliability","Required value - Achieved by inherently reliable design - Achieved by planned maintenance - Achieved by proof testing (methods, frequency, records)"]
[null,"Unplanned Maintenance","Overrides (records)"]
[null,"Performance","Loading - Spare capacity - Upgrade path - Disaster recovery"]
[null,"Environmental Condition","Temperature - External influence - Fire"]
[null,"Increased Temperature","Ambient changes - Self heating of components - Effect of direct sunlight - Cable routing - Fire resistance and support - HVAC failure"]
[null,"Decreased Temperature","Ambient changes - Winter conditions - Ice formation - HVAC failure"]
[null,"External Influences","Water damage/condensation - Flammable atmosphere - Internal damage (corrosion, tracking, overheating) - Stray currents - Mechanical damage/vibration - UV"]
[null,"Fire","Smoke - Fire detection - Fire fighting"]
["Unexpected Events","System Communication Failure","Component - Connection - Power source - Cable damage"]
[null,"Processing Failure","Too slow/fast (buffer capacity) - Redundancy/failover - Software - Hardware - Power - Wrong output"]
[null,"Extermal Influences","Input/output signals (false readings?) - Power supply - Special system features - Common mode failure - Environment - Other"]
[null,"Loss of Power - Short Term Impact","System - Components - Memory - Interactions - Alarm/s overload - Inrush"]
[null,"Loss of Power - Long Term Impact","System - Components - Memory - Interactions - System Features - UPS/Battery backups"]
[null,"Re-energisation of Power/Planned Reboot","System interactions/order - Memory - Alarms/Overload - Watchdogs - Default parameters - Startup routine - History/Archives - Resets required - Maximum output - Minimum output - Initial state - Final state"]
[null,"Loss of Communications Link","Link failure model (In/Out) - Relay link - Computer impact - Other computers affected"]
[null,"Spurious Data on Link","Error checking/correction - Vulnerable devices/memory corruption - Interactions - Timing (too fast/slow/wrong?) - Destination (Wrong?) - Data (too much/little/wrong?)"]
[null,"Watchdog/Hardware Alarms Failure - Concerns","Initiated by - How fast - System interaction - Alarms - Watchdog reset"]
[null,"Watchdog/Hardware Alarms Failure - Actions","None - Failover/No failover - Max/Min/Stay put - Fault diagnosis - Other"]
[null,"Abnormal Operations","Startup - Normal shutdown - Abnormal shutdowns - Accidental reset - Emergency process operations - System and application backups - Software and hardware upgrades"]
[null,"Application Issues","Application programs - Special application - Shared control - Quality assurance (functional requirements/investifations, expert checks, functional checks) - Subroutines - Special features (self tuning, model based) - Transfer between control actions - Vendor feedback (bugs, revisions) - User feedback"]
[null,"Shared Control","Effect of one device on another - Common mode failure - Display of interconnections - Alarms - Master/Slave - Resource assignment"]