Documentation Index
Fetch the complete documentation index at: https://handbook.fiddler.ai/llms.txt
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Comparison baseline types for alert rule thresholds.
Determines what the current metric value should be compared against when evaluating alert conditions.
TIME_PERIOD
Compare to a historical time period (relative comparison). Useful for detecting changes over time, seasonal patterns, etc. When using TIME_PERIOD, the compare_bin_delta parameter specifies how many time periods back to compare against.
RAW_VALUE
Compare to an absolute threshold value (absolute comparison). Useful for hard limits and business rule enforcement. When using RAW_VALUE, compare_bin_delta is ignored.
When using TIME_PERIOD, the allowed compare_bin_delta values depend on bin_size:
Example
# Compare current hourly drift to same hour yesterday (24 hours ago)
alert_rule = AlertRule(
compare_to=CompareTo.TIME_PERIOD,
bin_size=BinSize.HOUR,
compare_bin_delta=24 # 24 hours ago
)
# Compare daily metrics to last week (7 days ago)
alert_rule = AlertRule(
compare_to=CompareTo.TIME_PERIOD,
bin_size=BinSize.DAY,
compare_bin_delta=7 # 7 days ago
)
# Compare current accuracy to absolute minimum (no time comparison)
alert_rule = AlertRule(
compare_to=CompareTo.RAW_VALUE,
threshold=0.85 # Must be above 85%
)
TIME_PERIOD = ‘time_period’
RAW_VALUE = ‘raw_value’
