Browsing by Author "Ip, Chun"
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Item Etuvetoisen auton manuaalisen vaihteiston rakenne(2017-04-03) Ip, Chun; Kuuva, Markku; Insinööritieteiden korkeakoulu; Pietola, MattiItem Spare parts inventory optimization for azimuthing propulsion systems(2019-06-17) Ip, Chun; Merisalo, Jarkko; Insinööritieteiden korkeakoulu; Kujala, PenttiAzimuthing propulsors offer an efficient and environmentally friendly solution in today’s cruise industry. With an increasing growth in its customer base, cruise companies seek maintenance serviceability as important as the design of the product itself to raise their reliability. Therefore, cruise companies’ suppliers must have a proper inventory for spare parts in order to react on unexpected failures. In this thesis, an applicable spare parts availability model is evaluated by combining the inventory theories with the ship maintenance theories as well as ABB’s spare part engineers’ experiences. The model considers whether a component should be stored in the storage of a supplier in case of any emergency need as well as the optimal quantity of stocking. The designed model is then applied to an imaginary case in which a ferry is equipped with an actual product, Azipod D propulsor. The component chosen to be examined in this example case is thrust bearing which is one of the most critical components in Azipod propulsors. The total installed base and the cost of this chosen component are fictional. Applied tool has proposed that the chosen thrust bearing should be stored in supplier’s storage based on its criticality, installed base, cost and impacts on supplier’s image due to failure. However, verification of the operability of the model requires further applications in practice. It could be presumed that the presented availability tool can applied to other product types with minor adjustments.