Overview of Options and Start of Estimation Horizon
The table below summaries various options and their impact on the Start of the Estimation horizon.
Note:
Always ensure the Most Recent Measurement Date/Time is set to the measurement date/time furthest into the future. The Initialize Measuring Component Dates (D1-IMCDT) batch control has functionality for initializing the Most Recent Measurement Date/Time as well (if it was not set during conversion).
Measuring Component Type Maximum Days to Estimate
Feature Configuration
Measuring Component Dates
Measurement Data
Start of Estimation Horizon
Not Configured
Not Configured
Not Set
None
Horizon will begin based on the installation date/time:
• Interval uses the installation date/time
• Scalar uses the On event
Not Configured
Not Configured
Not Set
Yes, with some gaps
Horizon will begin based on the installation date/time:
• Interval uses the installation date/time
• Scalar uses the On event
Configured
Any
Not Set
Any
Horizon will begin based on the process date/time less the Maximum Days to Estimate
Configured
Any
Set
Yes - prior to Maximum Days to Estimate
Horizon will begin based on the process date/time less the Maximum Days to Estimate
Configured
Any
Set
Yes - after Maximum Days to Estimate
Horizon will begin based on the Latest Contiguous Measurement Date/Time
Not Configured
Configured
Not Set
None
Horizon will begin based on the process date/time less the hours configured on the feature configuration.
If it is not yet time to estimate based on the calculated start of the estimation horizon, then:
• Interval: Last Contiguous Measurement Date/Time is initialized to the calculated horizon start
• Scalar: Last Contiguous Measurement Date/Time is initialized to the calculated horizon start and Adjusted Last Contiguous Measurement Date/Time is set to the appropriate value based on the periodic estimation configuration.
Note: this would happen when the Hours Before Estimation (for example 72) is a larger number of hours than the No of Hours in the Past to Retrieve Last Usable Measurement (for example 24)
Not Configured
Configured
Not Set
Yes - outside feature configuration window
Horizon will begin based on the process date/time less the hours configured on the feature configuration.
If it is not yet time to estimate based on the calculated start of the estimation horizon, then:
• Interval: Last Contiguous Measurement Date/Time is initialized to the calculated horizon start
• Scalar: Last Contiguous Measurement Date/Time is initialized to the calculated horizon start and Adjusted Last Contiguous Measurement Date/Time is set to the appropriate value based on the periodic estimation configuration.
Note: this would happen when the  Hours Before Estimation (for example 72) is a larger number of hours than the No of Hours in the Past to Retrieve Last Usable Measurement (for example 24)
Not Configured
Configured
Not Set
Yes - inside feature configuration window
Horizon will begin as of the most recent measurement date/time that was found for the measuring component.
Not Configured
Configured
Set
Any
Horizon will begin based on the most recent of the following:
• Process date/time less the hours configured on the feature configuration
• Last Contiguous Measurement Date/Time