Browsing Engineering, Built Environment and Information Technology by Author "Yadavalli, Venkata S. Sarma"

Browsing Engineering, Built Environment and Information Technology by Author "Yadavalli, Venkata S. Sarma"

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  • Wentzel, John Peter; Diatha, Krishna Sundar; Yadavalli, Venkata S. Sarma (Routledge, 2013-12)
    The last 10 years have seen a significant increase in the provision of consumer services through technology. Computers, mobile phones, the Internet and self-service kiosks are examples of technology platforms that have ...
  • Yadavalli, Venkata S. Sarma; Vaidyanathan, V. S.; Chandrasekhar, P.; Abbas, S. (Taylor and Francis, 2017-03)
    Two-unit warm standby systems have been elaborately dealt within the literature. However, the study of standby systems with more than two units, though very relevant in state-of-the-art practical situations, has received ...
  • Adetunji, Olufemi; Yadavalli, Venkata S. Sarma; Malada, Awelani (Southern African Institute for Industrial Engineering, 2013-05)
    Government institutions need to assess how well they meet the needs of their customers, and what their customers think about the quality of the services they provide. This is aligned with the ‘Batho Pele’ principle of the ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (MDPI Publishing, 2018)
    Energy Measurement and Verification (M&V) aims to make inferences about the savings achieved in energy projects, given the data and other information at hand. Traditionally, a frequentist approach has been used to quantify ...
  • Mwanga, Y.A.; Joubert, Johan W.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2009-05)
    It is reasonable to expect that preparation time is needed to ready a repair facility before a repair can be carried out. A three-unit system with a `preparation time’ for the repair facility is studied in this paper. ...
  • Yadavalli, Venkata S. Sarma; Claasen, S.J. (Schalk Johannes); Singh, N. (Southern African Institute for Industrial Engineering, 2003)
    In practice, there are many quality control situations where a product under consideration may have two or more interrelated quality characteristics and observations of each characteristic are serially correlated. One of ...
  • Van Wyk, Estelle; Yadavalli, Venkata S. Sarma; Carstens, Herman (Springer, 2013)
    Somalia, a country situated in Eastern Africa has been struggling between rival warlords and an inability to deal with famine. Diseases have resulted to the deaths of up to millions of people. According to a New York Times ...
  • Mokilane, Paul; Galpin, Jacky; Yadavalli, Venkata S. Sarma; Debba, Provesh; Koen, Renee; Sibiya, Siphamandla (University of Pretoria, Department of Economics, 2018-03-27)
    BACKGROUND : This study involves forecasting electricity demand for long-term planning purposes. Long-term forecasts for hourly electricity demands from 2006 to 2023 are done with in-sample forecasts from 2006 to 2012 ...
  • Sankaraiah, G.; Sarma, B.D.; Umasankar, C.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2011)
    The reliability of a system is generally treated as a function of cost; but in many real-life situations reliability will depend on a variety of factors. It is therefore interesting to probe the hidden impact of constraints ...
  • Yadavalli, Venkata S. Sarma; Baraka, J.M.; Singh, R.; Southern African Transport Conference (33rd : 2014 : Pretoria, South Africa); Minister of Transport, South Africa (2014-07)
    Paper presented at the 33rd Annual Southern African Transport Conference 7-10 July 2014 "Leading Transport into the Future", CSIR International Convention Centre, Pretoria, South Africa.
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma; Rajan, Arvind (Elsevier, 2017-09)
    A method is presented for reducing the required sample sizes for reporting energy savings with predetermined statistical accuracy in lighting retrofit measurement and verification projects, where the population of retrofitted ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2017-11)
    Measurement and Verification (M&V) is often required for energy efficiency or demand side management projects in buildings, to demonstrate that savings were in fact achieved. For projects where sampling has to be done, ...
  • Yadavalli, Venkata S. Sarma; Karthikeyan, T.; Udayabaskaran, Swaminathan (South African Statistical Association, 2010-12)
    A mathematical model of a biological population, taking into account the effect of environmental in uences both on the life-time distribution and on the reproductive capacity of the individuals of the population, ...
  • Yadavalli, Venkata S. Sarma; Jeganathan, K. (Operations Research Society of South Africa, 2016)
    In this article, a service facility inventory system with server interruptions and a nite number of sources are considered. The inventory is replenished according to (s; S) ordering policy. Using the matrix methods, the ...
  • Kapur, P.K.; Gupta, A.; Yadavalli, Venkata S. Sarma; Claasen, S.J. (Schalk Johannes) (Southern African Institute for Industrial Engineering, 2006-11)
    Numerous Software Reliability Growth Models (SRGMs) have been discussed in the literature. These models are used to predict fault content and reliability of software. It has been observed that the relationship between ...
  • Wentzel, John Peter; Diatha, Krishna Sundar; Yadavalli, Venkata S. Sarma (Routledge, 2016-02)
    Financial exclusion has been shown to have negative socioeconomic effects on citizens, especially at the bottom of the economic pyramid. South Africa suffers from high levels of financial exclusion, disproportionately ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2017-02)
    Energy meters need to be calibrated for use in Measurement and Verification (M&V) projects. However, calibration can be prohibitively expensive and a ect project feasibility negatively. This study presents a novel low-cost ...
  • Grobler, Jacomine; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2008-11)
    This paper documents the results of a supply chain management (SCM) case study conducted at Centurion Ice Cream and Sweets CC, a producer of ice cream in the greater Gauteng area. The current SCM environment was first ...
  • Thaga, K.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2007-11)
    This paper proposes an exponentially weighted moving average (EWMA) control chart that is capable of detecting changes in both process mean and standard deviation for autocorrelated data (referred to as the Maximum ...
  • Carstens, Herman; Xia, Xiaohua; Yadavalli, Venkata S. Sarma (Elsevier, 2018-03)
    Measurement uncertainty is a key component in the overall uncertainty calculation for Measurement and Verification (M&V) projects. However, in some cases, it is reduced to outlier detection or basic uncertainty propagation ...