Selcen Ozturkcan

Multi Criteria Classification for Spare Parts Inventory

Maintenance operations directly influence the performances of railway vehicles and play a crucial role in railway services to provide uninterrupted and high quality service to passengers. With the exception of preventive activities, the demand of spare parts for maintenance tasks is usually random; hence, the fast and secure management of the spare parts inventory is an important factor for the successful execution of the maintenance process. The purpose of this research is to extend the classical ABC analysis by developing a multi-criteria inventory classification approach for supporting the planning and designing of a maintenance system. Relevant classification criteria and control characteristics of maintenance spare parts are identified and selected and discussed in terms of their effects on maintenance operations, purchasing characteristics, positioning of materials, responsibility of control, and control principles.

An analysis of the Gezi Park social movement tweets

Purpose Twitter usage during Gezi Park Protests, a significant large-scale connective action, is analyzed to reveal meaningful findings on individual and group tweeting characteristics. Subsequent to the Arab Spring in terms of its timing, the Gezi Park Protests began by the spread of news on construction plans to build a shopping mall at a public park in Taksim Square in Istanbul on May 26, 2013. Though started as a small-scale local protest, it emerged into a series of multi-regional social protests, also known as the Gezi Park demonstrations. The paper aims to discuss these issues. Design/methodology/approach The authors sought answers to three important research questions: whether Twitter usage is reflective of real life events, what Twitter is actually used for, and is Twitter usage contagious? The authors have collected streamed data from Twitter. As a research methodology, the authors followed social media analytics framework proposed by Fan and Gordon (2014), which included three consecutive processes; capturing, understanding, and presenting. An analysis of 54 million publicly available tweets and 3.5 million foursquare check-ins, which account to randomly selected 1 percent of all tweets and check-ins posted from Istanbul, Turkey between March and September 2013 are presented. Findings A perceived lack of sufficient media coverage on events taking place on the streets is believed to result in Turkish protestors’ use of Twitter as a medium to share and get information on ongoing and planned demonstrations, to learn the recent news, to participate in the debate, and to create local and global awareness. Research limitations/implications Data collection via streamed tweets comes with certain limitations. Twitter restricts data collection on publicly available tweets and only allows randomly selected 1 percent of all tweets posted from a specific region. Therefore, the authors’ data include only tweets of publicly available Twitter profiles. The generalizability of the findings should be regarded with concerning this limitation. Practical implications The authors conclude that Twitter was used mainly as a platform to exchange information to organize street demonstrations. Originality/value The authors conclude that Twitter usage reflected Street movements on a chronological level. Finally, the authors present that Twitter usage is contagious whereas tweeting is not necessarily.

Case Study 4: Diageo in Turkey: The Lion’s Milk Versus Global Spirits

Diageo, the world’s spirits giant, acquired the Turkish spirits market leader Mey Icki in 2011. By the time, Diageo had approximately 30% market share globally, while Mey Icki had approximately 70% domestic market share. Mey Icki had enjoyed benefits and perks of being a state-owned company, until TGP Capital, a US based private-equity firm, bought Mey Icki for

Teaching Note: Case 4: Diageo in Turkey: The Lion’s Milk Versus Global Spirits

800 million in 1996 from the privatization administration of Turkey. Five years later, TGP Capital sold Mey Icki to Diageo PLC for

An Expert System Approach for Improving Service-Levels between Buyer and Supplier

2.1 billion.

Dimensionalizing E-Grocery Shopping 'in Practice': An Illustration Through Turkish Consumers' Front-Loading Activities

Case starts with a global giant acquiring a local giant company. Both companies own some very strong brands. Post-acquisition era demands a new marketing strategy. The defined market, and the nature of competition need to be revisited. Competitive competencies need to be re-identified, in the face of changing economic, political, and taxation conditions in Turkey and abroad.

On-Line Reviews’ Impact on Trust Building

Service-level requirements emerge among the alternative strategies for supply chain firms that have already harvested the benefits of adopting ever low system wide costs. Though, the subjective and ever changing nature of services related understandings creates a challenge. In an attempt to fill this gap, our recent work presents an expert system approach, ESSER (Expert System Application for Suppliers to Improve Service-Levels) as a decision support mechanism for helping supplier firms to tailor their service offerings in order to meet updated service level requirements of their individual buyers.

Globalization and Economic Growth

Two supermarkets in Turkey offer mechanisms to encourage consumers to shop online. Little is, however, available to comprehend Turkish household purchasing arrangements, processes and practices for ...