1 / 8

Analysis of Queue Management in Crane and Keeper Operations

This analysis focuses on the essential classes and actions involved in managing connected queues within crane and keeper operations. Using a UML-like class model, we explore the dynamics of truck classes and the corresponding actions of cranes. The core model reveals that with a keeper occupation rate (rk) and crane occupation rate (rc), maintaining efficient operations is crucial. We investigate large queues, potential causes, and propose strategic solutions to enhance productivity, improve customer satisfaction, and address long-term operational challenges.

kirkan
Télécharger la présentation

Analysis of Queue Management in Crane and Keeper Operations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DCT Analysis

  2. Concepts: UML-like class model of essential classes and actions.

  3. Conceptual model: Simplest model: connected queues. More advanced models differ between 3 classes of trucks and various actions of crane.

  4. Essence: 2 connected queues. (only 8 exceptions out of 500) Most important parameters: rk (keeper occupation rate) rc (crane occupation rate) Assume M/D/1 queues (exp arrival, const processing) if rk ≥rc, then crane queue empty. If rk < rc, then average queue length keeper: C/(1-rk) average queue length crane+keeper: C/(1-rc) (approximately for some constant C) If e.g. rk= 0.9 and rc= 0.91, then keeper queue 10C and crane queue C. Greatest capacity problem with crane, though! c.f. Arena model DCT.doe in "examples" directory.

  5. Problem: large queues; keeper queue largest. Causes: keeper occupation rate too high, also crane capacity? Crane queue waiting time 35% of keeper waiting time, so crane capacity is an issue! Solutions: increase keeper productivity. Investigate crane occupation rate. Increase crane productivity also.

  6. Short-term temporary solution: increase working hours. Cost: extra payment to workers, which is manageable ("business is booming"). Benefits: less dissatisfaction of customers. Longer term solution for keeper problem: use IT! Crane solutions (in any combination): - faster crane - double queue - improve container storage

  7. Assignments • 4-5 assignments throughout the course • Bonus for exam: max. 2 points • Bonuses awarded for overall qualityand nice parts (e.g. concepts, problem analysis and suggestions). • This assignment:score ≥ 8: full bonus (.4)OK(7): small bonus (.2)

  8. Impression • Much enthousiasm and hard work. • Some reports were very good (talent or experience). Need course? • Others need not despair.Hopefully course will help you.

More Related