Device heath check calculation
Summarize
Summary of Device Health Check Calculation
The Device Health Check Calculation provides a structured approach to assess and categorize device performance as Good, Average, or Poor. This evaluation is based on a weighted average of performance indicators derived from subcategories associated with each device's health metrics.
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Key Features
- Performance Categories: Devices are classified into three performance categories: Good, Average, and Poor, based on weighted averages of performance indicators.
- Calculation Method: The performance for each subcategory is determined by a specific formula that factors in the weights of performance indicators.
- Score Range Definitions:
- Good: Average value lies in the range of (1, 1.67)
- Average: Average value lies in the range of (1.67, 2.33)
- Poor: Average value lies in the range of (2.33, 5)
- Example Calculation: A practical example illustrates how subcategory metrics contribute to the overall device performance classification.
Key Outcomes
By utilizing this calculation methodology, ServiceNow customers can effectively determine the health status of devices, enabling proactive management and remediation strategies. Accurate categorization of device performance allows organizations to prioritize maintenance and improve overall operational efficiency.
Device health calculation and categorization of performance as Good, Average, or Poor.
Calculating device health and performance
Performance for each device health category is classified as Good, Average, or Poor by calculating the weighted average of performance indicators from its associated subcategories.
| Performance Indicators | Weight | Upper bound | Lower bound |
|---|---|---|---|
| Good | 1 | 1.67 | 1 |
| Average | 2 | 2.33 | 1.67 |
| Poor | 5 | 5 | 2.33 |
- Formula used to calculate the subcategory performance indicators
Sub-category performance indicator= (weight of evaluation metrics performance indicator)/total number of evaluation metrics for the subcategory)where,- Evaluation metric performance indicator: Performance indicator (Good, Average, Poor) of the evaluation metrics' value as defined in the metric definition table. For more information, see Customize metric definitions.
- Weight: Weight of the performance indicator. After all the subcategories are marked as Good, Average, and Poor. The performance of the category is calculated by the weighted average of subcategories performance indicator.
- Score range definition
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The following defines the performance range and its corresponding classification:
- Good if the performance indicator average value lies in the range of (1, 1.67)
- Average performance indicator average value lies in the range of (1.67, 2.33)
- Poor performance indicator average value lies in the range of (2.33, 5)
- Formula used to calculate the parent category performance indicator:
Category performance indicator= (sum of sub-category performance indicator weights)/total number of sub-categories)- Example
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Consider the following example for the calculating the performance indicator for Device performance category that has the following subcategories:
Table 2. Sample Device health check calculation Subcategory Metric Metric value Subcategory performance metric calculation Subcategory Performance indicator Disk Space Disk Usage 90 Subcategory performance indicator = 5 (Weight of Poor indicator) / 1 (total no. of evaluation metrics for the subcategory) Poor Battery Health Battery health Good Subcategory performance indicator = 1 (Weight of Good indicator) / 1 (total no. of evaluation metrics for the subcategory) Good Computer Restart Device uptime 1 Subcategory performance indicator = 1 (Weight of Good indicator) / 1 (total no. of evaluation metrics for the subcategory) Good Performance indicator for Device performance category.
- Subcategory performance indicators = Poor, Average, Good
- Sum of weight of subcategory performance indicators: (5 + 1 + 1) = 7 Performance indicator = 7 / 3 (no. Of subcategories) = 2.33
- The device performance category is Poor (as 2.33 falls under the Poor range)