The bottleneck (BN) of a production system is a machine with the strongest effect on the system’s throughput. In this paper, a method for BN identification in serial lines with rework and Bernoulli machines is developed. In addition, the paper provides two system-theoretic results: First, it demonstrates that BNs may be shifting not only because of changes in machine and buffer parameters but a...

We analyze a one machine scheduling problem subject to breakdowns and preventive maintenance. The primary objective in this work is to minimize the capacity loss due to rework resulting from breakdowns and potential capacity loss due to unnecessary maintenance. We propose a model where the timeline is split into two alternating regions as risk free and risky regions by assuming that the machine...

The construction of E∞ ring spaces and thus E∞ ring spectra from bipermutative categories gives the most highly structured way of obtaining the K-theory commutative ring spectra. The original construction dates from around 1980 and has never been superseded, but the original details are difficult, obscure, and slightly wrong. We rework the construction in a much more elementary fashion.

This paper presents an empirical study in an industrial context on the production of software using a framework. Frameworks are semi-complete applications, usually implemented as a hierarchy of classes. The framework is developed first; then several applications are derived from it. Frameworks are a reuse technique that supports the engineering of product lines. In the study we compare quality ...

When the work and reputation of scientists suffer ritual degradation, a range of tactics can be deployed to resist and rework the psychological and social impacts. Five key resistance tactics to degradation in science are revealing degradation rituals, redeeming the reputation of the targeted scientist, reframing the degradation as unfair, redirecting attention to other domains, and refusing to...

the textit{commutativity degree}, $pr(g)$, of a finite group $g$ (i.e. the probability that two (randomly chosen) elements of $g$ commute with respect to its operation)) has been studied well by many authors. it is well-known that the best upper bound for $pr(g)$ is $frac{5}{8}$ for a finite non--abelian group $g$. in this paper, we will define the same concept for a finite non--abelian textit{...

Cardenas-Barron [L.E. Cardenas-Barron, Economic production quantity with rework process at a single-stage manufacturing system with planned backorders, Computers and Industrial Engineering 57 (2009) 1105–1113] minimizes the annual total relevant cost TC(Q , B) to find the economic production quantitywith rework process at amanufacturing system and assumes that TC(Q , B) is convex. So, the solut...

The requirement to improve software productivity has promoted the research on software metrics technology. Object Oriented paradigm is the technology being used to build fault free and stupendous softwares; and to make them fault free object oriented metrics are being used. These metrics are used to identify high risk components early in the design phase and hence help us to reduce the rework a...