SlideShare a Scribd company logo
1 of 13
CREW SCHEDULING
“a perspective to manage crew cost”
FACTS
 Crew cost is one of major cost components in
airline industries
 It is usually the second largest after fuel cost
 It is more controllable than fuel cost
 Savings in crew costs can be achieved through
better scheduling
FACTORS DETERMINE CREW UNIT COST
Benefits, work, and
rules driven by
contract cycle or
labours agitation
Hub and Spoke structure
creates extremely many
possible pairings
CREW SUPPLY CHAIN
Deciding
where the
fleet goes
Counting
the amount
of crew to
operate the
fleet
Hiring
people with
right quality
and quantity
Making
sure the
crew
readiness
to operate
the fleet
Giving
appropriate
task
Controlling
crew
movement
CREW SCHEDULING
 Crew Pairing
“sequence of flight legs own by the same aircraft type,
starting and ending at the same station, called the crew base.”
The objective is to use the minimum number of resources (crew)
to schedule (cover) the complete timetable.
 Crew Assignment
“the created pairings are assigned, together with other kinds of
activities, to actual crew, in compliance with the qualifications
and previously assigned activities, referred to as pre-
assignments, of the crew”
The objective is to find feasible assignments that minimize
costs without overriding crew’s quality of life.
CREW SCHEDULING METHOD
 Assigned Lines
 Bid Lines
 Preferential Bidding System
Operation
Planner
Crew
Schedule
Crew
Operation
Planner
Crew
Pairing
Crew Crew
Schedule
Crew Operation
Planner
Crew
Schedule
ASSIGNED LINES METHOD
 Simplicity
 Equality between junior
and senior crew member
 Low job satisfaction
 Susceptible to intervention
 Too many intervention
may cause inefficiency
Advantage Disadvantage
BID LINES METHOD
 High job satisfaction if
preferred pairing is
awarded
 Simplicity
 Offer a transparent and
easy process to bid and
to award
 Preferred pairing may
conflict with crew
members predetermined
activities
 Too many reallocation
assignment
 These inefficiencies also
force airlines to hire more
crew members.
Advantage Disadvantage
PREFERENTIAL BIDDING METHOD
 High job satisfaction
 Flexible pairing
 Efficient
 Complicated
 Difficult to award all
pairing
 It may take many hours
and multiple runs to
achieve the optimal
solution
Advantage Disadvantage
CONSTRAINT
 Personnel Constraint
 Time constrain
 Flight time
 Flight duty time
 Rest time
 Personnel activities
 Medical check
 Recurrent license
 Personnel rights
 Leg/flight Constraint
 Qualification
 Rating
 Language proficiency
 Company’s Standard
 Standard service
 Standard complement
 Seniority
 each flight must consist of
several crew generation to
ensure regeneration
RECOMMENDATIONS
 In order to perform an efficient crew rotation, crew
supply chain needed to manage as an integrated supply
chain.
 Every crew scheduling method has advantages and
disadvantages, thus every airlines must deeply
understand their own crew requirement to choose the
right method.
 Optimizer tools are needed to set the most efficient
schedule.
 Irregular operation procedure should be made to protect
optimum plan and to keep fairness among crew.
NOTES
Hi Readers,
Firstly, I’d like to say thanks for reading this, hope this could help
you, and I’m sorry if there is a mistake (Nobody’s perfect anyway
). If you have a question or want to discuss about this don’t
hesitate to contact my mail at lwidayanto@yahoo.com,
widayanto1986@yahoo.co.id, or widayanto86@gmail.com
I’m compiling this from many resources like airline magazine,
wikipedia, books, people’s research, articles, etc. I’d read so
many resources and it’s making me forget the “real” resources
:p. So, I’d like to say thanks to everybody who helps me making
this but unfortunately I couldn’t mention it one by one because of
that matter.
Thanks once again
Crew scheduling

More Related Content

What's hot

Revenue management overview
Revenue management overviewRevenue management overview
Revenue management overview
chinichiang0707
 
Ramp safety officer
Ramp safety officerRamp safety officer
Ramp safety officer
Ad Suryana
 
Airline Marketing 5 airline marketing strategies
Airline Marketing 5  airline marketing strategiesAirline Marketing 5  airline marketing strategies
Airline Marketing 5 airline marketing strategies
Narudh Cheramakara
 

What's hot (20)

Ramp Handling
Ramp HandlingRamp Handling
Ramp Handling
 
Airport Revenue Management
Airport Revenue ManagementAirport Revenue Management
Airport Revenue Management
 
Ground Handling
Ground HandlingGround Handling
Ground Handling
 
Revenue management overview
Revenue management overviewRevenue management overview
Revenue management overview
 
Aviation safety management
Aviation safety managementAviation safety management
Aviation safety management
 
Terminal Design
Terminal DesignTerminal Design
Terminal Design
 
Air cargo security and e commerce delivery
Air cargo security and e commerce deliveryAir cargo security and e commerce delivery
Air cargo security and e commerce delivery
 
Airline Operations
Airline OperationsAirline Operations
Airline Operations
 
Enhancing Passenger Experience Through Real Time Process Monitoring
Enhancing Passenger Experience Through Real Time Process MonitoringEnhancing Passenger Experience Through Real Time Process Monitoring
Enhancing Passenger Experience Through Real Time Process Monitoring
 
Ramp safety officer
Ramp safety officerRamp safety officer
Ramp safety officer
 
airside operation 3
airside operation 3airside operation 3
airside operation 3
 
Airport management
Airport managementAirport management
Airport management
 
Aircraft types and structure
Aircraft types and structureAircraft types and structure
Aircraft types and structure
 
Airport operation
Airport operationAirport operation
Airport operation
 
Principles of airline and airport management
Principles of airline and airport managementPrinciples of airline and airport management
Principles of airline and airport management
 
Scheduling and Revenue Management
Scheduling and Revenue ManagementScheduling and Revenue Management
Scheduling and Revenue Management
 
Operations management - Airline Scheduling
Operations management - Airline SchedulingOperations management - Airline Scheduling
Operations management - Airline Scheduling
 
Airport organization chart
Airport organization chartAirport organization chart
Airport organization chart
 
Aviation Technology in Tomorrow
Aviation Technology in TomorrowAviation Technology in Tomorrow
Aviation Technology in Tomorrow
 
Airline Marketing 5 airline marketing strategies
Airline Marketing 5  airline marketing strategiesAirline Marketing 5  airline marketing strategies
Airline Marketing 5 airline marketing strategies
 

Viewers also liked

Crew scheduling - Airline Industry
Crew scheduling - Airline IndustryCrew scheduling - Airline Industry
Crew scheduling - Airline Industry
nsihammou
 
CREW SCHEDULING
CREW SCHEDULINGCREW SCHEDULING
CREW SCHEDULING
Evren E
 
High-Level-Requirement-Document-For-BeatNik (1.1)
High-Level-Requirement-Document-For-BeatNik (1.1)High-Level-Requirement-Document-For-BeatNik (1.1)
High-Level-Requirement-Document-For-BeatNik (1.1)
mittul marwaha
 
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
Shannon Krause
 
Crumbley.tim
Crumbley.timCrumbley.tim
Crumbley.tim
NASAPMC
 
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
Johan Andersson
 

Viewers also liked (20)

Crew scheduling - Airline Industry
Crew scheduling - Airline IndustryCrew scheduling - Airline Industry
Crew scheduling - Airline Industry
 
CREW SCHEDULING
CREW SCHEDULINGCREW SCHEDULING
CREW SCHEDULING
 
CREW VRE Release 5 - 2009 May
CREW VRE Release 5 - 2009 MayCREW VRE Release 5 - 2009 May
CREW VRE Release 5 - 2009 May
 
ryanair Cabin crew roster
ryanair Cabin crew rosterryanair Cabin crew roster
ryanair Cabin crew roster
 
Session 29 Tomas Klemets
Session 29 Tomas KlemetsSession 29 Tomas Klemets
Session 29 Tomas Klemets
 
Controlled flight into terrain in visual conditions
Controlled flight into terrain in visual conditionsControlled flight into terrain in visual conditions
Controlled flight into terrain in visual conditions
 
High-Level-Requirement-Document-For-BeatNik (1.1)
High-Level-Requirement-Document-For-BeatNik (1.1)High-Level-Requirement-Document-For-BeatNik (1.1)
High-Level-Requirement-Document-For-BeatNik (1.1)
 
2011 GMC Terrain Toledo Owners Manual
2011 GMC Terrain Toledo Owners Manual2011 GMC Terrain Toledo Owners Manual
2011 GMC Terrain Toledo Owners Manual
 
Ppt on terrain awareness warning system
Ppt on terrain awareness warning systemPpt on terrain awareness warning system
Ppt on terrain awareness warning system
 
Career Education & Work Gov Inst 2008 Project Template
Career Education & Work Gov Inst 2008 Project TemplateCareer Education & Work Gov Inst 2008 Project Template
Career Education & Work Gov Inst 2008 Project Template
 
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
HighLevelSoftwareAppsforAccelerators_ShannonKrause_2009_09_30
 
Proceso de certificación de gráficos
Proceso de certificación de gráficosProceso de certificación de gráficos
Proceso de certificación de gráficos
 
TAG Based Proximity Warning Alert System
TAG Based Proximity Warning Alert SystemTAG Based Proximity Warning Alert System
TAG Based Proximity Warning Alert System
 
Airborne collision avoidance system
Airborne collision avoidance systemAirborne collision avoidance system
Airborne collision avoidance system
 
Whealan CrewSolver dss
Whealan   CrewSolver dssWhealan   CrewSolver dss
Whealan CrewSolver dss
 
Crumbley.tim
Crumbley.timCrumbley.tim
Crumbley.tim
 
Water transport
Water transportWater transport
Water transport
 
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
Terrain Rendering in Frostbite using Procedural Shader Splatting (Siggraph 2007)
 
V&V Considerations In Implementing IEC61508-3
V&V Considerations In Implementing IEC61508-3V&V Considerations In Implementing IEC61508-3
V&V Considerations In Implementing IEC61508-3
 
Crew resource
Crew resourceCrew resource
Crew resource
 

Similar to Crew scheduling

FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docxFAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
lmelaine
 
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docxFAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
nealwaters20034
 
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
Liu Dongyangyang
 
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
Yasar UCKUN
 
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
Nasser AL-Dhahli
 

Similar to Crew scheduling (20)

Shared aircraft spares holdings or pooling: To increase air carrier operation...
Shared aircraft spares holdings or pooling: To increase air carrier operation...Shared aircraft spares holdings or pooling: To increase air carrier operation...
Shared aircraft spares holdings or pooling: To increase air carrier operation...
 
Profit maximization
Profit maximizationProfit maximization
Profit maximization
 
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docxFAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
 
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docxFAA Advanced Qualification Program (AQP) and CRM for Military & .docx
FAA Advanced Qualification Program (AQP) and CRM for Military & .docx
 
Capacity Management
Capacity ManagementCapacity Management
Capacity Management
 
Enhancing Pilot Ability to Perform CDA with Descriptive Waypoints
Enhancing Pilot Ability to Perform CDA with Descriptive WaypointsEnhancing Pilot Ability to Perform CDA with Descriptive Waypoints
Enhancing Pilot Ability to Perform CDA with Descriptive Waypoints
 
Personal and Weather Risk Assessment Guide v1.0
Personal and Weather Risk Assessment Guide v1.0Personal and Weather Risk Assessment Guide v1.0
Personal and Weather Risk Assessment Guide v1.0
 
Airline Catering
Airline CateringAirline Catering
Airline Catering
 
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
Low Cost Carrier Tigerair Australia-Strategies, safety, sustainability and gr...
 
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
Scenario-Based Training.ppt YASAR [Otomatik kaydedilme]
 
Lufthansa Systems Turnaround Management Solution in Aircraft Commerce Magazine
Lufthansa Systems Turnaround Management Solution in Aircraft Commerce MagazineLufthansa Systems Turnaround Management Solution in Aircraft Commerce Magazine
Lufthansa Systems Turnaround Management Solution in Aircraft Commerce Magazine
 
NEW TUTORIAL CS OKT 2019.pptx
NEW TUTORIAL CS OKT 2019.pptxNEW TUTORIAL CS OKT 2019.pptx
NEW TUTORIAL CS OKT 2019.pptx
 
A-CDM
A-CDMA-CDM
A-CDM
 
A case of money
A case of moneyA case of money
A case of money
 
Transition Training
Transition TrainingTransition Training
Transition Training
 
Tushar - Resume1
Tushar -  Resume1Tushar -  Resume1
Tushar - Resume1
 
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
Air asia’ core competencies distinctive its success ( Nasser AL-Dhahli)
 
White paper 4 steps to a great passenger experience
White paper   4 steps to a great passenger experienceWhite paper   4 steps to a great passenger experience
White paper 4 steps to a great passenger experience
 
LOA Exceptional Release - Winter 2016 pages 30-36
LOA Exceptional Release - Winter 2016 pages 30-36LOA Exceptional Release - Winter 2016 pages 30-36
LOA Exceptional Release - Winter 2016 pages 30-36
 
Safety Management Systems in Business & Corporate Aviation
Safety Management Systems in Business & Corporate AviationSafety Management Systems in Business & Corporate Aviation
Safety Management Systems in Business & Corporate Aviation
 

Recently uploaded

Architecting Cloud Native Applications
Architecting Cloud Native ApplicationsArchitecting Cloud Native Applications
Architecting Cloud Native Applications
WSO2
 
Cloud Frontiers: A Deep Dive into Serverless Spatial Data and FME
Cloud Frontiers:  A Deep Dive into Serverless Spatial Data and FMECloud Frontiers:  A Deep Dive into Serverless Spatial Data and FME
Cloud Frontiers: A Deep Dive into Serverless Spatial Data and FME
Safe Software
 

Recently uploaded (20)

Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
 
ICT role in 21st century education and its challenges
ICT role in 21st century education and its challengesICT role in 21st century education and its challenges
ICT role in 21st century education and its challenges
 
MS Copilot expands with MS Graph connectors
MS Copilot expands with MS Graph connectorsMS Copilot expands with MS Graph connectors
MS Copilot expands with MS Graph connectors
 
Emergent Methods: Multi-lingual narrative tracking in the news - real-time ex...
Emergent Methods: Multi-lingual narrative tracking in the news - real-time ex...Emergent Methods: Multi-lingual narrative tracking in the news - real-time ex...
Emergent Methods: Multi-lingual narrative tracking in the news - real-time ex...
 
AWS Community Day CPH - Three problems of Terraform
AWS Community Day CPH - Three problems of TerraformAWS Community Day CPH - Three problems of Terraform
AWS Community Day CPH - Three problems of Terraform
 
Apidays New York 2024 - The value of a flexible API Management solution for O...
Apidays New York 2024 - The value of a flexible API Management solution for O...Apidays New York 2024 - The value of a flexible API Management solution for O...
Apidays New York 2024 - The value of a flexible API Management solution for O...
 
Architecting Cloud Native Applications
Architecting Cloud Native ApplicationsArchitecting Cloud Native Applications
Architecting Cloud Native Applications
 
presentation ICT roal in 21st century education
presentation ICT roal in 21st century educationpresentation ICT roal in 21st century education
presentation ICT roal in 21st century education
 
Ransomware_Q4_2023. The report. [EN].pdf
Ransomware_Q4_2023. The report. [EN].pdfRansomware_Q4_2023. The report. [EN].pdf
Ransomware_Q4_2023. The report. [EN].pdf
 
Cloud Frontiers: A Deep Dive into Serverless Spatial Data and FME
Cloud Frontiers:  A Deep Dive into Serverless Spatial Data and FMECloud Frontiers:  A Deep Dive into Serverless Spatial Data and FME
Cloud Frontiers: A Deep Dive into Serverless Spatial Data and FME
 
Real Time Object Detection Using Open CV
Real Time Object Detection Using Open CVReal Time Object Detection Using Open CV
Real Time Object Detection Using Open CV
 
GenAI Risks & Security Meetup 01052024.pdf
GenAI Risks & Security Meetup 01052024.pdfGenAI Risks & Security Meetup 01052024.pdf
GenAI Risks & Security Meetup 01052024.pdf
 
2024: Domino Containers - The Next Step. News from the Domino Container commu...
2024: Domino Containers - The Next Step. News from the Domino Container commu...2024: Domino Containers - The Next Step. News from the Domino Container commu...
2024: Domino Containers - The Next Step. News from the Domino Container commu...
 
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law DevelopmentsTrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
 
Artificial Intelligence Chap.5 : Uncertainty
Artificial Intelligence Chap.5 : UncertaintyArtificial Intelligence Chap.5 : Uncertainty
Artificial Intelligence Chap.5 : Uncertainty
 
A Year of the Servo Reboot: Where Are We Now?
A Year of the Servo Reboot: Where Are We Now?A Year of the Servo Reboot: Where Are We Now?
A Year of the Servo Reboot: Where Are We Now?
 
DBX First Quarter 2024 Investor Presentation
DBX First Quarter 2024 Investor PresentationDBX First Quarter 2024 Investor Presentation
DBX First Quarter 2024 Investor Presentation
 
How to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected WorkerHow to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected Worker
 
AXA XL - Insurer Innovation Award Americas 2024
AXA XL - Insurer Innovation Award Americas 2024AXA XL - Insurer Innovation Award Americas 2024
AXA XL - Insurer Innovation Award Americas 2024
 
Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood
Polkadot JAM Slides - Token2049 - By Dr. Gavin WoodPolkadot JAM Slides - Token2049 - By Dr. Gavin Wood
Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood
 

Crew scheduling

  • 1. CREW SCHEDULING “a perspective to manage crew cost”
  • 2. FACTS  Crew cost is one of major cost components in airline industries  It is usually the second largest after fuel cost  It is more controllable than fuel cost  Savings in crew costs can be achieved through better scheduling
  • 3. FACTORS DETERMINE CREW UNIT COST Benefits, work, and rules driven by contract cycle or labours agitation Hub and Spoke structure creates extremely many possible pairings
  • 4. CREW SUPPLY CHAIN Deciding where the fleet goes Counting the amount of crew to operate the fleet Hiring people with right quality and quantity Making sure the crew readiness to operate the fleet Giving appropriate task Controlling crew movement
  • 5. CREW SCHEDULING  Crew Pairing “sequence of flight legs own by the same aircraft type, starting and ending at the same station, called the crew base.” The objective is to use the minimum number of resources (crew) to schedule (cover) the complete timetable.  Crew Assignment “the created pairings are assigned, together with other kinds of activities, to actual crew, in compliance with the qualifications and previously assigned activities, referred to as pre- assignments, of the crew” The objective is to find feasible assignments that minimize costs without overriding crew’s quality of life.
  • 6. CREW SCHEDULING METHOD  Assigned Lines  Bid Lines  Preferential Bidding System Operation Planner Crew Schedule Crew Operation Planner Crew Pairing Crew Crew Schedule Crew Operation Planner Crew Schedule
  • 7. ASSIGNED LINES METHOD  Simplicity  Equality between junior and senior crew member  Low job satisfaction  Susceptible to intervention  Too many intervention may cause inefficiency Advantage Disadvantage
  • 8. BID LINES METHOD  High job satisfaction if preferred pairing is awarded  Simplicity  Offer a transparent and easy process to bid and to award  Preferred pairing may conflict with crew members predetermined activities  Too many reallocation assignment  These inefficiencies also force airlines to hire more crew members. Advantage Disadvantage
  • 9. PREFERENTIAL BIDDING METHOD  High job satisfaction  Flexible pairing  Efficient  Complicated  Difficult to award all pairing  It may take many hours and multiple runs to achieve the optimal solution Advantage Disadvantage
  • 10. CONSTRAINT  Personnel Constraint  Time constrain  Flight time  Flight duty time  Rest time  Personnel activities  Medical check  Recurrent license  Personnel rights  Leg/flight Constraint  Qualification  Rating  Language proficiency  Company’s Standard  Standard service  Standard complement  Seniority  each flight must consist of several crew generation to ensure regeneration
  • 11. RECOMMENDATIONS  In order to perform an efficient crew rotation, crew supply chain needed to manage as an integrated supply chain.  Every crew scheduling method has advantages and disadvantages, thus every airlines must deeply understand their own crew requirement to choose the right method.  Optimizer tools are needed to set the most efficient schedule.  Irregular operation procedure should be made to protect optimum plan and to keep fairness among crew.
  • 12. NOTES Hi Readers, Firstly, I’d like to say thanks for reading this, hope this could help you, and I’m sorry if there is a mistake (Nobody’s perfect anyway ). If you have a question or want to discuss about this don’t hesitate to contact my mail at lwidayanto@yahoo.com, widayanto1986@yahoo.co.id, or widayanto86@gmail.com I’m compiling this from many resources like airline magazine, wikipedia, books, people’s research, articles, etc. I’d read so many resources and it’s making me forget the “real” resources :p. So, I’d like to say thanks to everybody who helps me making this but unfortunately I couldn’t mention it one by one because of that matter. Thanks once again