Creating forecast for a sub fleet

You can create forecast for a sub fleet in this page.

• Select the “Create Aircraft Forecast” link under the “Aircraft Maintenance Forecast” business component.

The “Create Forecast” page appears.

The system displays the following field:

•  Enter the following fields in the “Search Criteria” group box, to search for a sub fleet for which you wish to generate aircraft forecast. Data entry in the following fields is optional:

•   Click the “Search” pushbutton to search for the sub fleet.

The system retrieves the sub fleet details in the multiline.

•   Enter the following fields in the “Forecast Defaults” group box:

Note: If you leave this field blank, the system generates the forecast number as set in the “Forecast Numbering Type” field of the “Create Sub Fleet” activity.

The system displays the following in the “Forecast Details” multiline:

• Enter the following fields:

•  Check the box in the “Select” column of the multiline to select the sub fleet for generating forecast.

Note: Ensure that atleast one sub fleet is selected in the multiline.

•  Click the “Create Forecast” pushbutton to generate the forecast for the selected sub fleet.

Note: While forecasting for the sub fleet, only those aircraft that are in “Active” status as defined in the “Aircraft” business component, are considered.

The system performs the following:

• Generates the forecast number as per the selected numbering type.

• Sets the status of the forecast as “Fresh”.

• Updates the generated forecast number as the ‘Last generated number’ in the “Document Numbering Class” business component.

• Generates component forecasting number, if the option “Forecast Components along with the Aircraft” is set as “Yes” in the ”Set Options” activity.

Note: On automatic generation of the component forecast, the system copies the expense type of the workunits from the component maintenance program to the pending tray.

• Sets the execution status of each work unit  as 'Forecasted'.

• On successful creation of an aircraft forecast number, the system does the following:

• Identifies the active aircraft(s) that are associated to the sub fleet.

• Retrieves active maintenance programs associated to the aircraft(s), from the “Aircraft Maintenance Program” business component. The system retrieves the following details from the maintenance program:

§    Schedule number, cycle number, work unit number, work unit type and job type

§    Active work units

§    Independent schedules or Dependent schedules of the work units

Date - based forecasting

• Retrieves next schedule date of the work unit from the “Maintenance Program” business component, for date based independent schedule of “One Time” or “Recurring” type.

Note: If the “Next schedule date” exceeds the “Terminating Date”, then the system will not retrieve the maintenance requirement of the aircraft for forecast.

• Computes the Alert Date, Earliest Schedule Date and the Latest Schedule Date for the schedule type.

§    It calculates the Earliest Scheduled Date as

ESD = Schedule Date -- Negative Tolerance

§    It calculates the Lastest Scheduled Date as

LSD= Schedule Date + Positive Tolerance

§    It calculates the Alert Date as

Alert Date= Schedule Date -- Alert Value (If the tolerance/alert value is given in months / years, then the system will convert it into number of days and perform the calculation.)

Parameter based forecasting

• Retrives the usage parameter utilization value from the “Edit Utilization” page. If the utilization value is not available at the forecast level, then the utilization value for all the parameters of the sub fleet, identified for each session are retrieved from the “Edit Sub Fleet Utilization” page.

• If no utilization value is specified at both forecast level and sub fleet level,the system retrieves the usage values of all the consumption parameters that is common for all the aircraft(s) of the sub fleet for which the reference is set as 'Yes', from “Aircraft” business component.

Note: The next scheduled date and alert dates are calculated as done for date - based forecasting.

Scheduled date of maintenance arising calculation:

The system calculates the scheduled date of maintenance arising as follows:

Remaining number of days = Remaining life in terms of parameters / average daily usage value of parameter

Average usage value of parameter calculation

• If the aircraft reference is set as “Yes”, then the system takes the average value as given. Else, the ‘Forecasting Factor’ is taken and average value is calculated as below

Average value = Forecast factor * average value for the lead parameter.

Arising Details

If the “Next Schedule Date” is within forecasting start date and end date, then the system lists the “Arisings Details”.

• The system lists all the schedule dates for the retrieved schedule number and work unit combination. If more than one schedule date is retrieved,the system applies the “Sch.Execution Rule” as identified in the “Maintenance Program” business component to find the next schedule date.

• If the schedule date is less than the forecast start date,the system retrieves the arising details of the maintenance activities only if the previous forecasted workunits are in the “Closed” status.

Component Forecast

If the option “Forecast Components along with the Aircraft” is set as “Yes” in the ”Set Options” activity, then the system,

• Checks if the aircrafts figuring in the current sub fleet has valid “Planner Group” in the “Component Maintenance Planning” business component.

•  Checks if the forecasting range of the planner group is same as the sub fleet.

• Checks if the login user has valid permission to generate the forecast, if the option “Component Planning Group Security” is set as “Yes”.

• Checks if the login user is figuring in all the planning group which are getting forecasted, if the option “Component Planning Group Security” is set as “Yes”.

• Identifies the list of components associated with the planner group. Forecasting is performed on all the components of the planner group.

Note: If the “Next schedule date” exceeds the “Terminating Date”, then the system will not retrieve the maintenance requirement of the component for forecast.

• Stores the forecasted output, that is the component ID/work unit details along with the scheduled dates ,with the Job Source as "CMP".

• Identifies the lead parameter and the usage value of the lead parameter for both the aircraft and the component from the "Aircraft" business component, If the component is attached to the aircraft.

Note: If the “Next schedule date” exceeds the “Terminating Date”, then the system will not retrieve the maintenance requirement of the component for forecast.

• For the work unit with date-based calculation for next schedule date, the system updates the triggering parameter as "Calendar" in the "Central Planning" business component.

• For the work unit with usage-based calculation for next schedule date, the system updates the “Triggering parameter” field in the "Central Planning" business component, with the parameter that is used for next schedule date calculation.

To proceed, carry out the following

• Select the “Edit Utilization” link at the bottom of the page to modify the utilization values for the aircraft forecast.

• Select the “View Forecast” link at the bottom of the page to view forecast details.

• Select the “Release Forecast” link at the bottom of the page to release the forecast for maintenance activities.

What you can do in this page

Specify the forecast schedule date

Specify the forecast schedule date

You can enter the end date of the aircraft forecast.

Note: The system sets the current server date as the “Start Date”.

•   Enter the “End Date” in the “Forecast Details” multiline.

•   Click the “Create Forecast” pushbutton to create the aircraft forecast.

The system generates the forecast number and sets the status of the aircraft forecast as “Fresh”.