System Risk Records

System Risk records store details about a Risk in a System Analysis and the cost of an equipment or location failure due to that Risk. Multiple System Risk records can be linked to a single System Asset record to represent multiple ways in which that piece of equipment or location can fail. The following table provides an alphabetical list and description of the fields that exist for the System Risk family and appear on the System Risk datasheet by default. The information in the table reflects the baseline state and behavior of these fields. This list is not comprehensive.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site, and will then only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. See the Site Filtering section of the documentation for more information on using this feature.

Field Caption Data Type Description Behavior and Usage
Description text Additional information that is used to identify the Risk.

You can enter a description of the Risk into this field manually.

This field appears in the General section.

Failures Without Replacement Logical Indicates whether or not the piece of equipment or location is replaced after each failure that results from the Risk. By default, this check box is cleared. If this check box is selected, the piece of equipment or location is not replaced after each failure (as good as old). If this check box is cleared, the piece of equipment or location is replaced after each failure (as good as new).
Fixed Unplanned Correction Cost Number Indicates the set cost of a piece of equipment or location when it fails as a result of the Risk. Fixed cost does not change as a result of other variables, such as downtime. An example of fixed unplanned correction cost is the cost of a new piece of equipment.

By default, this field contains the value 0.

This field appears in the Correction section.

Is Active Logical Indicates whether or not the piece of equipment's or location's operating time accumulates while the system is running. After a potential failure is detected, this value indicates whether the piece of equipment's or location's remaining life is reduced when the system is active or latent.

This value is a characteristic of the piece of equipment or location to which the Risk is related and should be the same for all Risks related to the same piece of equipment or location. By default, this check box is selected. If the check box is selected, the piece of equipment's or location's operating time will accumulate while the system is running, and the Is Latent check box should be cleared. This means that the v or location will lose lifetime while the system is running.

For example, when a car (i.e., the system) is moving, a tire's (i.e., piece of equipment's) lifetime is being used up. The tire is active.

This field is available in the Simulations Options section.

Is Latent Logical Indicates whether or not the piece of equipment's or location's operating time accumulates while the system is idle. After a potential failure is detected, this value indicates whether the piece of equipment's or location's remaining life is reduced when the system is active or latent.

This value is a characteristic of the piece of equipment or location to which the Risk is related and should be the same for all Risks related to the same piece of equipment or location. By default, this check box is cleared. If check box is selected, the piece of equipment's or location's operating time will accumulate while the system is idle, and the Is Active check box should be cleared. This means the piece of equipment or location will lose lifetime when the system is not running.

For example, when a car (i.e., the system) is idle and not being used, failures can occur that will affect the hydraulic braking system (i.e., piece of equipment's). The rate of these failures is not impacted by the car being used or being idle, and is therefore latent in nature.

Last Failure Date Indicates the most recent date that the piece of equipment or location failed due to the Risk. You can use the Calendar tool to select the date of the most recent equipment or location replacement.
Name Character The name of the Risk. You can enter the name of the Risk in this field manually. This value is used to identify Risks in the System Reliability Analysis.
Number of Subcomponents Number The number of subcomponents to which the Risk applies. By default, this field contains the value 1. The value should be greater than 1 only if the Failure Without Replacement check box is selected.
Percentage of PF Interval to Wait Number A numeric value that indicates how long to wait to repair the piece of equipment or location after detecting a potential failure due to this Risk.

By default, this field contains the value 0 and should be used only if the Repair Immediately check box is cleared. This value indicates at what percentage of the value in the PF Interval field the piece of equipment or location should be repaired.

For example, an engineer monitors a Risk more frequently after a potential failure is detected and does not want to repair the piece of equipment or location immediately. If a potential failure is detected at the start of the PF Interval, and the engineer knows that the piece of equipment or location will not actually fail for 10 more days (i.e., a PF Interval of 10), he might decide to initiate a repair strategy six days later, or at 60 percent of the PF Interval. In this case, the Percentage of PF Interval to Wait is 60 percent.

PF Interval Number The time between when a potential failure is detectable and when an actual failure will occur. By default, this field contains the value 0. This value is used along with the value in the Percentage of PF Interval to Wait field to determine when a piece of equipment or location should be repaired after a failure. The P-F Interval is determined by the user and is not calculated by the system.
PF Interval Units Character The time units associated with the PF Interval.

by default, this value is set to Days. You can select from a list of the following options:

  • Minutes
  • Hours
  • Days
  • Weeks
  • Months
  • Years

Planned Correction Cost

Number The total cost (i.e., fixed cost plus variable cost) of a planned correction that will prevent the Risk from resulting in a functional failure. An example of a planned correction is a routine equipment cleaning. By default, this field contains the value 0. A planned correction does not happen as a result of a failure.
Planned Correction Duration Number The time nedeed to implement a planned correction. By default, this field contains the value 0.
Planned Correction Duration Units Character The time units associated with the Planned Correction Duration.

By default, this value is set to Days. You can select from a list of the following options:

  • Hours
  • Days
  • Weeks
  • Months
  • Years
Repair Immediately Logical A value that indicates whether or not the piece of equipment or location should be repaired immediately if a potential failure due to this Risk is detected. By default, this check box is selected. If the check box is selected, the piece of equipment or location should be repaired as soon as an inspection detects a failure, regardless of the remaining life of the piece of equipment or location. If the check box is cleared, the piece of equipment or location should be repaired according to the value in the Percentage of PF Interval to Wait field.
Variable Unplanned Correction Cost Number A number that indicates the variable cost associated with the downtime of an piece of equipment or location when it fails due to the Risk. An example of variable unplanned correction cost is the cost of labor per time period of the mechanic that repairs the piece of equipment or location. By default, this field contains the value 0.
Variable Unplanned Correction Cost Units Character The time units associated with the Variable Unplanned Correction Cost.

By default, this value is set to Per Day. You can select from a list of the following options:

  • Per Hour
  • Per Day
  • Per Week
  • Per Month
  • Per Year

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