Reliability of mission-based k-out-of-n systems with exponential phase durations and component lifetimes

This paper focuses on the reliability analysis of [Formula: see text]-out-of-[Formula: see text] systems which are designed to perform a given mission consisting of several distinct phases. As the phases of the mission change, the reliability characteristics of the system and the system structure vary accordingly. The phase transition probabilities, phase durations, and component failure rates are dependent on the number of operating components. Moreover, the system is allowed to have cold, warm, or hot standby components. We propose computationally tractable methods to compute the system reliability, mean time to failure, and long-run availability for such a general system structure. We also provide a numerical analysis to show the applicability and the empirical computational complexity of the proposed methods.

Mission Change Over Time in U.S. Family Foundations

How much do foundations change their missions over time? Grant making emphases may shift due to the evolving preferences of trustees and directors, the changing needs of grant recipients, the location of the successor trustees, and so on. A countervailing force to this change is donor control. The founding donor’s stipulations and values figure prominently as legal and sentimental forces that could enhance mission permanence despite the passing of generations. This study first proposes a mission change theory framework designed for the long time span of endowed family foundations. Via changes in the stated location of the grant making and the field of the grants made (e.g., from grants for religious instruction to grants for arts), we then measure the revealed preferences of trustees and how their grant making practices change over the decades.

Peningkatan Kapabilitas Karyawan dan Penerapan Budaya Baru Perusahaan dalam Mewujudkan Daya Saing

The rapidly changing world environment requires companies to adjust to existing conditions. Environmental changes that occur include technology, information systems, economic and political causes of the emergence of new regulations and derivatives so that industry and industry players in the implementation can run well. One telecommunication company in Indonesia in maintaining revenue and profit growth improves employee capability and application of new corporate culture in realizing competitiveness. A vision and mission change with complete comprehensive transformation with a strategy embodied in employee-driven programs based on company values. The company in transformation years periode from 2011 until 2016 hold engagement survey with main result the majority of opinions like the changes that occur. Researcher use survey method questionnaires to gather information after reborn launched from Indosat Ooredoo employees as respondents that distributed to a level of staff, managers, division heads and group heads. Descriptive statistical analysis methodology is used to analyze information that has been collected. The results data analysis of the questionnaire showed that 7 (seven) variables assessing the improvement of employee capabilities and the application of the company's new culture in realizing competitiveness showed that the seven variables affected the level of security and comfort of employees and middle management.