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