House of Quality

The importance of text mining is increasing in services management as the access to big data is increasing across digital platforms enabling such services. This study adopts a systematic literature review on the application of text mining in services management. First, we analyzed the literature on which has used text mining methods like Sentiment Analysis, Topic Modeling, and Natural language Processing (NLP) in reputed business management journals. Further, we applied visualization tools for text mining and the topic association to understand the dominant themes and relationships. The analysis highlighted that social media analysis, market analysis, competitive intelligence are the most dominant themes while other themes like risk management and fake content detection are also explored. Further, based on the analysis, future research agenda in the field of text mining in services management has been indicated.

Applications of text mining in services management: A systematic literature review

Data have been utilised in production research in meaningful ways for decades. Recent years have offered data in larger volumes and improved quality collected from diverse sources. The state-of-the...

From data to big data in production research: the past and future trends

Rheology of mineral oil-SiO2 nanofluids at high pressure and high temperatures

Fluid film lubrication in the presence of cavitation: a mass-conserving two-dimensional formulation for compressible, piezoviscous and non-Newtonian fluids

Aspect-based Kano categorization

A high-pressure chamber is used to study lubricant compressibility when refrigeration oil is diluted by refrigerant The tested lubricant in this work is a POE (polyol ester) oil, POE diluted with 

Compressibility of Oil/Refrigerant Lubricants in Elasto-Hydrodynamic Contacts

An increasing number of products are equipped with software and sensors. This suggests that, in order to deliver more customised performance, future products will be developed to accommodate systems that supply information on how these products are used. Today, information on the customer’s way of using a product is seldom factored into product design, but the opportunities for making use of it are increasing dramatically due to the amount of available data that can be logged. The proposed methodology is to formulate Customer Needs at a detailed level to be able to link customer satisfaction with a clear interface to the Design Requirements. These links are obtained by combining information acquired by means of surveys, among other methodologies, as well as usage data from customer products. The method is based on the planning House of Quality and also takes cost and risk into consideration. Risk is estimated using the Analytical Hierarchy Process, whereby a hierarchy of the most relevant customer informa...

Combining customer needs and the customer’s way of using the product to set customer-focused targets in the House of Quality

Experiments have been carried out to measure the film thickness between a sapphire disc and a polished steel ball when slippage is permitted between the two surfaces. The velocity sum of the two surfaces was kept constant during the measurements. The method used to determine the oil film thickness in the contact zone is optical interferometry.



It was observed that the change in minimum film thickness was slight. When the sliding velocity was increased, the decrease in central film thickness was considerably larger than that of the minimum film thickness. In addition, the two side lobes, in which the minimum film thickness area occurs, were observed to become flatter as the sliding velocity was increased.

Measurement of the influence of sliding velocity on oil film thickness in an elastohydrodynamic point contact

– The ability to build up a film thickness separating the contacts in the bearing is essential to assure long service life of rolling element bearings. Rolling element bearings used in refrigeration suffer from poor film thickness due to decreased viscosity of the lubricant by the dilution of refrigerant in the oil. The purpose of this paper is to redesign a bearing test apparatus equipped with a capacitance measuring device able to monitor the lubrication status in the bearing online and include experiments to verify the capacitance measuring technique., – The objective is to design a complete system to study film build up in rolling element bearings in a refrigerant environment and to use and evaluate the capacitance/resistance measuring technique., – The investigation shows good correlation between denting on tested bearings and the identified contacts by the capacitance measuring apparatus. The method is also useful when studying lift‐off or run‐in of a bearing., – In this paper, a bearing test apparatus is redesigned and equipped with a capacitance measuring device able to monitor the lubrication status in the bearing on‐line. The paper includes experiments to verify the capacitance measuring technique.

Ove Isaksson

Papers

Aspect-based Kano categorization

Compressibility of Oil/Refrigerant Lubricants in Elasto-Hydrodynamic Contacts

Combining customer needs and the customer’s way of using the product to set customer-focused targets in the House of Quality

Measurement of the influence of sliding velocity on oil film thickness in an elastohydrodynamic point contact

Measurement of lubrication conditions in a rolling element bearing in a refrigerant environment