Update of computation basis controls - Section A:

The system updates the NSD / NSV computation basis controls ‘Next Due Calc. On’, ‘Calc. Ref. Date’ and ‘Last Schedule Date / Value’ for aircraft / component tasks, under various scenarios, as follows:

Scenario

Compliance Status

Next Due Calc. On

Calc. Ref. Value / Date

Last Schedule  Date / Value

On adding task, if no schedules are available (Aircraft task)

Pre-Compliance

Blank

Blank

Blank

If 'Date based schedules' gets copied from 'Maintenance Task' component or 'Model Program', and NSD is computed based on ‘Reference Basis’ - Operational Date or Induction Date (Aircraft task)

Pre-Compliance

Induction / Operation  Date

Corresponding Date

Not Applicable

On addition of component task

Pre-Compliance

Mfr. Date

Corresponding Date

Not Applicable

NSD computation based on 'Threshold / Interval Value' entered

Pre-Compliance

Initial Interval

Threshold / Interval Value

Not Applicable

NSD / NSV computation based on ‘Update Basis’ - Time Window or Schedule

Post Compliance

Time Window / Schedule

Last Due Value / Date

Last Due Value / Date

NSD / NSV computation based on ‘Update Basis’ - Actual Completion

Post Compliance

Actual Completion

Last Performed Value

Last Due Value

On addition of a task with 'Initiated / Reset by' set as "Related Task Compliance"

Related Task Compliance

Not Applicable

Not Applicable

Not Applicable

On compliance of a parent 'Initiate Schedule' task

Related Task Compliance

Not Applicable

Not Applicable

Last Due Value / Date

On compliance of parent 'Initiate Schedule' task will trigger its 'Initiate Schedule' "Related Task Compliance" task

Related Task Compliance

RTC

Last Performed  Date / Value of parent task

Not Applicable

NSD / NSV computation based 'Schedule Reset Basis' set as "Last Schedule"

Short Term Escalation

STE : Last Schedule

Last Due Value / Date

Last Due Value / Date

NSD / NSV computation based 'Schedule Reset Basis' set as "Actual Completion"

Short Term Escalation

STE : Actual Completion

Last Performed Value / Date

Last Due Value / Date

On modifying interval for task having Position Based Schedule (PBS)

Pre-Compliance

PBS : Mfr. Date /  PBS : Initial Interval

Corresponding Date / Threshold or Interval

Not Applicable

On modifying interval for a complied task having position based schedule (complied with in the permitted limit of time window)

Post Compliance

PBS : Time Window

Last Due Date / Value

Last Due Value / Date

On modifying interval for a complied task having position based schedule (complied with in the limit on  last compliance or  'Update Basis' is set as "Actual Completion")

Post Compliance

PBS : Actual Completion

Last Performed Date / Value

Last Due Value / Date

On compliance of parent task triggering its 'Initiate Schedule' "Related Task Compliance" task

Post Compliance

PBS : RTC

Last Performed  Value of parent task

Not Applicable

NSD computation based 'Schedule Reset Basis' set as "Last Schedule"

Short Term Escalation

PBS-STE : Last Schedule

Last Due Date / Value

Last Due Value / Date

NSD computation based 'Schedule Reset Basis' set as "Actual Completion"

Short Term Escalation

PBS-STE : Actual Completion

Last Performed Date / Value

Last Due Value / Date