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A cow that fails to conceive must either be kept for a year without revenue or replaced by a bred heifer. This choice is a unique case of comparing investments with different economic lives because the potential replacement asset is just a newer version of the old asset. In this study, a net present value model is developed that eliminates the problem of finding a common timeframe. Results indicate there are often times producers should keep the open cow. Whenever feed costs are low, the price differential between cull cows and replacement heifers is high, or the calf crop value is low, retaining open cows becomes more desirable.

A capital budgeting decision procedure appropriate for choosing the continuance, replacement, or abandonment of an asset‐in‐place is examined. The optimal replacement decision on an asset already in service requires simultaneous consideration of project life, project chaining, and possible abandonment points for both the asset‐in‐place and the replacement asset. The additional information required for the suggested procedure over the traditional replacement procedure is generally manageable and a practical solution procedure is feasible.

Despite the existence of multiple asset replacement theories, the economic life replacement method remains a major practical technique for making rational machine replacement decisions. The purpose of this paper is to bridge this method with comprehensive data analytic tools and make it applicable it to modern business reality with abundant data on operating and replacement costs.

This study employs operations research, discrete and continuous optimization, applied mathematical modeling, data analytics, industrial economics and real options theory.

Constructed stochastic algorithms extend the deterministic economic life method and are compared to the contemporary theory of stochastic asset replacement based on real options and dynamic programming. It is proven that both techniques deliver similar results when the cost volatility is small. A major theoretic finding is that the cost uncertainty speeds up the replacement decision.

This research suggests that the proposed stochastic algorithms may become an important tool for managerial decisions about replacement of many similar machines with detailed data on operating and replacement costs.

Compared to the real options replacement theory, major advantages of the proposed algorithms are that they work equally well for any distribution of age-dependent stochastic operating cost. The algorithms are tested on a real industrial case about replacement of medical imaging devices. Numeric simulation supports obtained analytic outcomes.

The knowledge and practice that are known as accounting are little more than a complex series of conventions. The accounting historian, or researcher, or practitioner, cannot turn to any original authoritative source for confirmation or clarification on basic points of principle. To the financially untrained observer all talk of an unstructured and flexible foundation to accounting must seem to be at odds with the precision and authority with which he sees financial statements being presented to the reader, be he shareholder, banker or manager. Profit and loss accounts and balance sheets look so beautifully cut and dried, so obviously “right”. Well of course they are, but that is only because accountants have adopted and refined conventional procedures to produce such tidy statements. There is nothing unarguable or sacrosanct about accounts—absolutely nothing.

This paper aims to analyse the implementation of istibdal waqf property in several states of Peninsular Malaysia. To achieve this objective, this study identified the amount of waqf property ‘am (general) and waqf property khas (special) which were involved in the process of istibdal in each state, the factors that have caused the istibdal to be implemented, the rate of istibdal involved for each lot of waqf lands and the type of property replacement performed.

This study used the qualitative method, whereby the researchers had collected secondary data consisting of documents related to waqf from the State Islamic Religious Council (MAIN). The type of documents obtained were public records. The data collected were analysed using the content analysis techniques.

The results showed that there are several factors involved in the implementation of istibdal, namely, the acquisition of waqf land by the State Authority, applications by external parties for a particular interest and the initiatives taken by the MAIN on waqf property which is problematic and uneconomical to generate waqf fund. This study also found some Shariah and management issues, which were identified in the implementations of istibdal, whereas some cases of istibdal were only carried out on a small part of the waqf lands and there were also cases of the implementation of istibdal which have not been replaced with fixed assets as authorised by the istibdal parameter. This study suggests some improvements to the issues identified in the implementation of istibdal for waqf managers in Malaysia.

The limitation of this study is that it analyses only the documents that record the implementation of istibdal in the states managed by MAIN. Thus, the analysis performed was limited to the documents obtained without involving empirical data.

This study suggests some improvements to the implementation of istibdal waqf in the states studied. Therefore, these recommendations can be used by waqf property managers to improve the process of implementing waqf property istibdal so that it can be used to its maximum potential.

If the recommendations in this study can be implemented, the Muslim community will benefit greatly from the waqf property because it is being developed through the method of istibdal. This impact can increase the confidence of the Muslim community towards MAIN in managing waqf property and encouraging the Muslim community to contribute to waqf property for the welfare of the ummah.

This study involved data on a larger waqf istibdal implementations that involved several states in Peninsular Malaysia, which to the best of the authors’ knowledge, the analysis involving such large research data have not been implemented before.

Our chapter raises serious questions about the long-term efficiency of stock prices in relation to the realized returns of the underlying corporate real assets. In our large-scale calculations that cover horizons of 10, 20, 30, 40, and 50 years, returns on corporate real assets suffer a long-term decline, and have been below the yields of 10-year Treasury bonds since 1973. Real assets that received more external financing from capital markets and institutions actually report even lower realized long-term returns. The decline in realized returns cannot be attributed to declining risks as the volatilities of realized returns have been increasing over time. These surprising results may stimulate fresh debate on the roles and long-term performance of capital markets and institutions.

A substantial number of production assets in the offshore oil and gas industry are facing operation beyond their anticipated design life, thus necessitating a service life extension program in the future. Selection of the most suitable strategy among a wide range of potential options to extend the lifetime of equipment (e.g. re-using, reconditioning, remanufacturing, refurbishing and adding on safety/process control measures) remains a challenging task that involves several technical, economic and organizational complexities. In order to tackle this challenge, it is crucial to develop analytical tools and methods capable of evaluating and prioritizing end-of-life strategies with respect to their associated costs and quantifiable benefits. The paper aims to discuss these issues.

This paper presents a life-cycle cost-benefit analysis approach to identify the most suitable life extension strategy for ageing offshore assets by taking into account all the capital, installation, operational, maintenance and risk expenditures during the extended phase of operation. The potential of the proposed methodology is demonstrated through a case study involving a three-phase separator vessel which was constructed in the mid-1970s.

The results from the application case indicate that the capital expenditure (CapEx) accounts for the largest portion of life cycle cost for the replacement strategy, while risk expenditure (RiskEx) is the major contributor to costs associated with life extension. A sensitivity analysis is also conducted to identify factors having the greatest impact on the optimum life extension solution, including oil price, production rate and money interest rate.

In the past, the decisions about life extension or replacement of in-service equipment were often made in a qualitative way based on experience and judgment of engineers and inspectors. This study presents a “quantitative” framework to evaluate and compare the costs, benefits and risks associated with life extension strategies and subsequently to select the best strategy based on benefit/cost ratios.

To the best of authors’ knowledge, no studies before have applied life cycle assessment and cost-benefit analysis methods to prioritize the potential life extension strategies in the oil and gas industry sector. The proposed approach not only assists decision makers in selecting the most suitable life extension strategy but also helps duty holders reduce the costs corresponding to life extension execution.

The question whether the use of an asset will be terminated before its physical life expires is of interest to financial managers. In other words, purchasing an asset does not necessitate its use until the end of its physical life. An asset might be terminated because it is inefficient to continue operating, or because it can be replaced. Thus, in a single cycle problem, the objective is to determine how long an asset should be employed before termination. In a replacement problem, the focus is on determining how long the asset should be held before being replaced with a similar one.

The purpose of this paper is to present a methodology to improve decision making about investments that reduce buildings' energy consumption.

A three‐stage methodology was developed and tested to analyse an existing Australian office building's energy use, its energy rating, and its life cycle investment. In total, seven cases of sets of improvements were modelled for energy performance. Their investment value was evaluated using a life cycle‐based analysis across several investment options.

A holistic approach to investment shows that the most effective sustainable refurbishments need not be the most expensive. Optimised investment can take advantage of the timing of both re‐investment in component renewal and efficiency gains from the refurbishment. Furthermore, relatively small changes in income can offset capital expenditure for refurbishments and protect against obsolescence.

Much work on sustainable refurbishments rarely considers the investment basis, across a life cycle, of that expenditure, generally seeing them as a cost and rarely considers the optimal time for that expenditure in the asset life cycle. This paper addresses both concerns.

This paper aims to determine the stage of the life cycle where the trucks of a waste collection fleet from a Colombian city are located through a reliability approach. The reliability analysis and the evaluation of curve of operational costs allow to know the moment in which it is necessary to make decisions regarding an asset, its maintenance or possible replacement.

For a dataset presented as maintenance work orders, the time to failures (TTFs) for each vehicle in the fleet were calculated. Then, a probability density function for those TTFs was fitted to locate each vehicle in a region of the bathtub curve and to calculate the reliability of the whole fleet. A general functional analysis was also developed to understand the function of the vehicles.

It was possible to determine that the largest proportion of the fleet was in the final stage of the life cycle, in this sense, the entire fleet represent critical assets which in most of cases could be worth replacement or overhaul.

In this study, an address is exposed for the identification of critical equipment by reliability and statistical analysis. This analysis is also integrated with the maintenance management process. This is a broadly interested topic since it allows to support the maintenance and operational decision-making process, indicating the focus of resource allocation all over the entire asset life cycle.