La crítica a la casuística y a la teoría de la virtud

The Meters application is used to keep the records, life-to-date, and history of the consumption of an asset. The three types of meters are:

򐂰 Continuous, which is cumulative, such kilometers and miles, hours of use, engine starts, and fuel consumed

򐂰 Gauge, which can be, for example, fuel level, oil pressure and level, and noise level

򐂰 Characteristic, which are asset characteristics such as vibrating, noise, and color

2.3.1 Meters and meter groups

You can create meters and meter groups in the Meters application and then within the Item Master application, associate a meter to an item or a meter group on a rotating item. As mentioned in 2.3, “Meters” on page 22, meters can be of three types: continuous (kilometers life-to-date, liters consumed), gauge (a temperature reading), and characteristic (a color, a vibration level, a sound level).

When you associate a continuous meter to an item and then issue the item to a work order, asset, or location, IBM Maximo Asset Management updates the associated asset or location record with the quantity that was issued and decreases the storeroom balance of that item. (This process happens only when the meter on the item matches the meter on the asset or location.)

For example, you might have FUEL defined as a meter and GASOLINE as an item. Within Item Master, you can associate the meter FUEL to the item GASOLINE. When you issue fuel for an asset, such as a truck, IBM Maximo Asset Management decreases the balance of the fuel in the storeroom by the amount issued, and in the Assets application on the Meters tab, you can see that the amount of fuel issued to the truck increases by the issued amount. This approach allows you to track fuel consumption for that asset.

With MILES for example, you can track the life-to-date of a vehicle and its consumption average of miles that a vehicle uses by day or by month. To do that, when associating with an Asset, you have to specify an Average Calculation Method of SLIDING-DAYS and specify the Sliding Window Size.

The two methods to calculate an average can be by using the last readings (sliding-readings) or by the last days (sliding-days). In both cases, you specify the quantity of days or the reading in the field Sliding Window Size, as shown in the example in Figure 2-12.

Chapter 2. Assets 23 Figure 2-12 Average Calculation Method on Assets application

The field Average Units/Day indicates the average in the period that is specified as the Sliding Window Size; the Life to Date for Asset field indicates the sum of all readings, such as the odometer of a car for example.

A meter group is a set of meters that you can apply to an asset record. In the case of a rotating item, IBM Maximo Asset Management automatically applies any meter group that is associated with the rotating item to any assets that are created for that item.

For example, a pump is a rotating item. On a pump, you might track meters such as inlet pressure, outlet pressure, and vibrations. These meters are common to all pumps. Instead of having to add these meters to each asset record created for this rotating item, you may instead create a meter group with this collection of pump-related meters and associate it with the rotating item. Each time you create an asset record for the pump, IBM Maximo Asset Management associates the meter group and its meters to the asset record so that you do not have to do it manually.

2.3.2 Condition Monitoring

The Condition Monitoring application is used to create and view measurement point records for your assets and locations. A measurement point record defines the limits of acceptable meter readings for a characteristic or gauge type meter on an asset or location. You can generate preventive maintenance (PM) work orders or work orders with a specific job plan for assets or locations whose meter readings are outside acceptable limits.

Each measurement point is unique. You can compare similar measurement points on different assets or locations using meter readings. For example, you may use similar types of compressors in multiple locations, but you might have purchased the compressors from different vendors. If you have a pressure gauge on each of those compressors, you can generate reports that enable you to compare the pressure readings on those compressors. This information helps you to determine whether the compressors from one vendor are more efficient

than a similar compressor from another vendor. You may not use a meter name more than once on an asset or location record, but you may use the same meter name on multiple asset and location records.

Condition Monitoring tab is shown in Figure 2-13 on page 24.

:

Figure 2-13 Condition Monitoring application main fields

Within those fields, you specify the Point of the monitoring condition by providing the asset name, meter to be monitored, its site, meter type, and the unit of measure.

Then, you have to specify the range by setting the Upper Limits and the Lower Limits as shown in Figure 2-14 and in Figure 2-15, respectively.

Figure 2-14 Upper Limits section under Condition Monitoring application

Figure 2-15 Lower Limits section under Condition Monitoring application

Chapter 2. Assets 25 All measurements can be entered as part of a work order rather than directly against the measure point record in the Condition Monitoring application. When this is the case, a better approach is to set up a cron task to automate the generation of the work order when the limits have been exceeded.

Initially set the schedule on the cron task instance to run every 10 minutes. If you use an existing instance, check the OrgID and SiteID cron task parameters. To verify whether the cron task has been run, review the Cron Task History after the specified time. If the last measurement has exceeded its action limits, you will find that a work order was generated.

There are two main differences between measurement points for characteristics meters and for continuous meters. When an upper or lower limit exceeds its limit for a characteristics meter, a preventive maintenance (PM) item is generated.

When you are working with a continuous meter, a work order can be generated manually or with a cron task as described previously.