IE102 A Process Outlook for Industrial Engineering

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Presentation transcript:

IE102 A Process Outlook for Industrial Engineering Bilkent University Lecture 2 Recapture the material covered in lectures for individual sections

Short Quiz 1 We will remember the basics of the previous lecture http://getkahoot.com/ You have 60 seconds to register to the quiz Please remain silent through activity If you enter anything other than ID as your nickname, you will directly receive 0 points.

Meaning of the word “Process” Engineered Processes A series of actions, changes, functions; steps A particular “economic” motive May be repetitive Part of another process Structured – “well-defined” Measurable outcome

Last week-Rice Cooking Example Existence of Alternatives Actions – decisions Duration of frying Duration of boiling/ intensity of heat Quantity of water to use Cooking duration for low heat Duration (waiting) before serving Worthwhile? Catering firm? Army? Longer-term decisions (type of rice, stove, energy source, .....)

Airport Operations Sub-processes after plane reaches the gate until it leaves for another destination. Name those sub-processes. The ones we are familiar were detailed! Possible improvement ideas to decrease the total time the plane stays at the gate.

Subprocesses mentioned Engagement to the gate (1) Passengers out (2) Crew out (3) Security check for left material (4) Cleaning crew (5) Crew in (6) Catering Service (7) Newspaper service (8)

Subprocesses mentioned Head Phones (9) Passengers in (10) Equipment (in plane) check (11) Finalized flight information available (12) Passenger safety instructions (13) Final OK from air traffic controller (14) Final equipment check, locks (15) Disengagement from the gate (16)

Subprocesses mentioned Engine check (A) Equipment check (Pilot’s cabin) (B1-B...) Gas refill (C) Wheel checks (D) Other maintenance procedures (E) Baggage out (I) Baggage in (II) All are related – how?

Summary of Improvements Suggested (with our additions) Passenger in/out (boarding/exiting) Passengers in an order (change process) Increase aisle width Use of moving-platforms/elevators Shorter distances – redesign gates More doors Cabin baggage locations restructured More gates New gate layout designed

Improvements (continued) Unload/load Baggage Standardize baggage Better handling - crew schedules Crews with more people Design new equipment – simultaneous Redesign a new system Cleaning Plane Crew starts cleaning Others: Use of standard (smaller) planes Speed up Check-in operations (e-ticket, ..) Training crews ......

Improvements (continued) Improvement Ideas - in General More resources (personnel, gates, ...) Redesign (reorganize) the process – change the order, new operations, remove operations, change precedence, ... Schedule (change, improve, ..) – flight times, cleaning crews, ... Space utilization (layout)

Improve Boarding Many different boarding strategies: Certain codes in the boarding passes which differentiate boarding times. Issues to consider: -passengers blocking in the aisle due to: pass to their seat (aisle seated before window) place their hand luggage

Improve Boarding Many different boarding strategies: 1. BackToFront (B2F) 2. Random 3. WindowMiddleAisle (WMA) 4. Steffen (Mixture of B2F and WMA with skipping and performing one side at a time) 5. SortedBoardingGroups (SBG) 6. DynamicallyOptimizedBoarding (DOB) (Similar to Steffen, considers cliques - who wants to board together)

Improve Boarding Video : Boarding

Improve Boarding Simulation Strategy Time units B2F 667,56 Random 661,26 SBG 547,56 WMA 496,86 Steffen 487,86 DOB 490,1

Wrap-up – your experience Simple ideas – may work – trade-off: demand effect More sophisticated – requires planning (schedule, layout) or investment Requires technical knowledge of the process, hence we have less suggestions Smart ideas that require further analysis before implementation

Wrap-up (continued) Airport Operations – Numerous processes Complexity of the situation (history of IE) Decisions are embedded in the processes Decisions are interrelated IE’s role – improvement via changing the implementation (decisions) Improvement with respect to a performance measure (total duration – Toast Kaizen) Examples for improvement: schedule, layout, equipment selection, boarding

How do IE’s handle these decisions? Generalizations Time span of decisions: Short, Medium, Long (operational, tactical, strategic) Importance – All affect processes – not all are handled for a given purpose rice cooking, airline operations How do IE’s handle these decisions? Engineering approach - a process, as well! How is IE different than other similar jobs? Mathematical orientation - structured decisions repeated consistently - main value-added for IE’s over “smart” people

Issues Summarized/Keywords Interrelated processes, complex decision making – IE emphasis Performance measure(s) Mathematical representation – Rice Cooking – Abstract thinking, modeling, decision variables Improvement idea Time span of decisions

Important Generic Areas for Decision Making Generic: A lot applications approached with similar abstraction Example 1: Layout The way in which different parts of an area, volume is arranged Examples – factory, gate, warehouse, office Decision variables: size (continuous), function discrete)

Important Generic Areas for Decision Making (cont.) Example 2: Schedule A plan of activities or events and when they will happen Examples – assembly line, construction, course Decision variables for course scheduling: when (time - continuous), where (location of class – discrete)