Selective RSL - Multiple FM's

How: This article describes how the 'Selective RSL' functionality can be used in case multiple Spec's on Floc's (and Eq) are involved.

Floc and Eq specs

In this example three Spec's are used on a Control valve, which can have values: YES, NO or blank:

• ECS SEVERE SERVICE
• ECS TEMPERATURE OVER 400
• ECS OVERHAUL REPLACEMENT

With three Specs considered and two variables per Spec (being: Yes / No) , one would get 8 possibilities.
Note you cannot steer an RSl based on a blank Spec.

To illustrate the effect of the Strategies on a Selective RSL using three Spec's, we created below 8 Flocs:

Below picture shows how the Spec's show up in IMS for just three demo Flocs:
10FRC-S0-T0-R0, 10FRC-S1-T0-R0 and 10FRC-S1-T1-R1.

With insight in the available Specs, we recommend to set up a story-line from the Location type/ Equipment group, to the relevant FM's and to the applicable maintenance tasks.
The objective is to get a line of sight what the effect of the different Specs might be on the FM scenario and on the various applicable tasks.

For the control valses considered, the Failure Modes involve:

• ACTUATOR FAILURE
• AIR FILTER FAILURE
• CV FAILURE
• CV GLAND LEAKAGE
• CV PASSING
• CV POSITIONER FAILURE

From the FM's we recommend to define the applicable tasks which will be the base for the RSL structure used next.

Dependent on the Spec we steer the maintenance tasks in the RSL in existence and content.

Effect of Spec on FM and Tasks

Herewith an example for a Control valve with Failure Mode: Actuator Failure.
If we consider intense time base degradation of the actuator, we indicate that we like to do Cleaning and Storke test every 4 years.
If we consider minor degradation of the actuator, we indicate that we like to do Cleaning and Storke test every 10 years.

Using the ECS OVERHAUl REPLACEMENT Spec, we can steer the 4 yr tasks on a 'YES' and the 10 yr tasks on a 'NO'.

Set up Selective RSL

In this picture the first strategy is cretaed on the selective RSL - showing the applicable tasks and Strategy requirements in terms of specific Specs:
Here: Severe Service = No; T over 400 = No; Overhaul Repl = No.

This is the second Strategy.
Here: Severe Service = No; T over 400 = No; Overhaul Repl = Yes.

This is the third Strategy.
Here: Severe Service = No; T over 400 = Yes; Overhaul Repl = No.

This is the fourth Strategy.
Here: Severe Service = Yes; T over 400 = No; Overhaul Repl = No.

This is the fifth Strategy.
Here: Severe Service = Yes; T over 400 = No; Overhaul Repl = Yes.

This is the sixth Strategy.
Here: Severe Service =Yes; T over 400 = Yes; Overhaul Repl = No.

This is the seventh Strategy.
Here: Severe Service = No; T over 400 = Yes; Overhaul Repl = Yes.

This is the final - eight Strategy.
Here: Severe Service = Yes; T over 400 = Yes; Overhaul Repl = Yes.

Assign Flocs to the Strategy

When the Selective RSL Strategies are set up, and the Flocs with Specs are created, the Selective RSL strategies can be assigned. In this video the cretaed Selective RSL Strategies are shown. Also the Flocs with Specs are shown. The video shows the assignment steps involved:

In the end, 8 different strategies are applied via one RSL, driven by various Spec values. The RSL and the Strategies are shown connected to the relevant Flocs, in in the grid: