in this paper, absorbing markov chain models are developed to determine the optimum process mean levels for both a single-stage and a serial two-stage production system in which items are inspected for conformity with their specification limits. when the value of the quality characteristic of an item falls below a lower limit, the item is scrapped. if it falls above an upper limit, the item is ...

Quality is a critical attribute of software. A software process with sophisticated design and analysis would benefit the quality of the output software greatly. To enhance the quality of a software process, some quality assurance activities need to be incorporated into the process. As a consequence, the quantity of rework activities as well as the cost and duration of the process would be incre...

Production systems with scrapped and rework items have recently become an interesting subject of research. While most attempts have been focused on finding the optimal production quantity in a simple production system, little work appears on a joint production environment. In this research, two joint production systems in a form of multiproduct singlemachine with and without rework are studied ...

Planning and managing large-scale projects is non-trivial, as evidenced by the large number of projects that exceed budget and schedule targets. In many cases, rework is a key factor in project delays. Accurate rework prediction is challenging – even when the tasks responsible for rework can be identified, the likely project impact is difficult to determine. The work described in this paper exa...

Although software managers are generally good at new project estimation, their experience of scheduling rework tends to be poor. Inconsistent or incorrect effort estimation can increase the risk that the completion time for a project will be problematic. To continually alter software maintenance schedules during software maintenance is a daunting task. Our proposed framework, validated in a cas...

This paper indicates how effective software-process programming languages can lead to improved understandings of critical software processes, as well as improved process performance. In this paper we study the commonly mentioned, but seldom defined, rework process. We note that rework is generally understood to be a major software development activity, but note that it is poorly defined and und...

EPQ model; Replenishment lot size; Multiple deliveries; Random defective items; Production; Rework; Scrap items. Abstract This paper derives the optimal replenishment lot size and shipment policy for an Economic Production Quantity (EPQ) model with multiple deliveries and rework of random defective items. The classic EPQmodel assumes a continuous inventory issuing policy for satisfying demand a...

in this model, we establish an inventory model to determine the optimal inventory replenishment scheme for the economic production quantity (epq) model for imperfect, deteriorating items with sales return service under multiple production and rework setup. in one cycle, production process can produces the products in m production setups and reworks the defective items in one rework setup. the c...

Our long-term research in process programming is based on the hypothesis that software processes can and should be captured accurately and formally, using executable formalisms to support execution, analysis, and understanding. Many process languages have been developed over the years for modeling processes formally. In this paper, we argue that for automated support, we need not a process mode...