Attached are comments made by Donald McDonald.
Original Message:
Sent: 08-16-2023 12:40 PM
From: Christian H. Heller
Subject: (PUBLIC REVIEW DRAFT) 10S-90: Cost Engineering Terminology (Rev. August 15, 2023)
If you are providing comments using the Excel file please note that the column marked "RP Section (Term)" is a drop down field listing all the terms that are currently up for review. Pick the ones that you wish to provide comment on.

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Christian Heller
Director of Technical Guidance
AACE International
cheller@aacei.org
Original Message:
Sent: 08-15-2023 02:32 PM
From: Christian H. Heller
Subject: (PUBLIC REVIEW DRAFT) 10S-90: Cost Engineering Terminology (Rev. August 15, 2023)
The following initial comments were made by the Technical Board.
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Christian Heller
Director of Technical Guidance
AACE International
cheller@aacei.org
Original Message:
Sent: 08-15-2023 02:30 PM
From: Christian H. Heller
Subject: (PUBLIC REVIEW DRAFT) 10S-90: Cost Engineering Terminology (Rev. August 15, 2023)
(PUBLIC REVIEW DRAFT – Open until September 29, 2023) 10S-90: Cost Engineering Terminology (Rev. August 15, 2023)
The following new and revised terms and definitions are being considered in this update:
(Revised) RISK, SYSTEMIC
(Revised) RISK, PROJECT-SPECIFIC
(New) HYBRID RISK ANALYSIS
(Revised) UNCERTAINTY
(Revised) EVENT
(Revised) RISK EVENT
(Revision) CONDITION, RISK
(New) INHERENT VARIABILITY
(Revised) RISK, BACKGROUND
(New) RISK, CONTINGENT
(Revised) EMERGENT RISK
(Revised) UNKNOWN UNKNOWN
(New) SYSTEMATIC ERROR
(Revised) BIAS
(New) UNCERTAINTY, DISCONTINUOUS
(New) UNCERTAINTY, KNIGHTIAN
(Revised) KNOWN UNKNOWN
(New) UNCERTAINTY, CONTINUOUS
(New) UNCERTAINTY, GENERAL ESTIMATE
(New) RISK EVENT, DISCRETE
(New) UNKNOWN KNOWN
(New) RANDOM ERROR
(New) NOISE
(New) INHERENT RISK EXPOSURE
(New) CURRENT RISK EXPOSURE
(New) TARGET RISK EXPOSURE
(New) ALARP
(New) RISK INFORMED DECISION MAKING
(New) CONTINUAL RISK MANAGEMENT
(Revised) LONGEST PATH
(Revised) CRITICAL PATH
(Revised) CRITICAL ACTIVITY
(Revised) NEAR-CRITICAL ACTIVITY
(New) REQUEST FOR EQUITABLE ADJUSTMENT (REA)
This draft RP is open for review and comment until September 29, 2023.
You may provide your comment by either:
· Posting a message directly
· Providing mark-up in the PDF file
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Christian Heller
Director of Technical Guidance
AACE International
cheller@aacei.org
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