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Critical Chain: A New Project Management Paradigm or Old Wine in New Bottles?

Thomas G. Lechler, Boaz Ronen, Edward A. Stohr
2005 Engineering Management Journal  
Is CC as some authors assert, one of the most important breakthrough for project management since the introduction of the Critical Path concept (CP) or does CC merely consist of known concepts presented  ...  As a result, CC focuses at improving the systems performance by laying out specific policies many of which are focused on resource management especially in multiproject environments that are not explicitly  ...  Acknowledgment This work was supported by a grant from NASA's Center for Project Management Research (CPMR).  ... 
doi:10.1080/10429247.2005.11431672 fatcat:6jrruubj3jc6dm7cu64laypg4a

End-to-end performance forecasting

Ali G. Saidi, Nathan L. Binkert, Steven K. Reinhardt, Trevor Mudge
2009 SIGARCH Computer Architecture News  
resources such as flow-control credits), and predict the benefit of eliminating bottlenecks by increasing hardware speeds or expanding available resources.  ...  By modeling systems as collections of state machines interacting via queues, we can trace critical paths through multiplexed processing engines, identify when resources create bottlenecks (including abstract  ...  Srilatha (Bobbie) Manne and Mark Hill provided comments on early drafts of this paper that helped us improve the presentation considerably.  ... 
doi:10.1145/1555815.1555800 fatcat:hypfckpyyzf7tl3m2soi3abete

End-to-end performance forecasting

Ali G. Saidi, Nathan L. Binkert, Steven K. Reinhardt, Trevor Mudge
2009 Proceedings of the 36th annual international symposium on Computer architecture - ISCA '09  
resources such as flow-control credits), and predict the benefit of eliminating bottlenecks by increasing hardware speeds or expanding available resources.  ...  By modeling systems as collections of state machines interacting via queues, we can trace critical paths through multiplexed processing engines, identify when resources create bottlenecks (including abstract  ...  Srilatha (Bobbie) Manne and Mark Hill provided comments on early drafts of this paper that helped us improve the presentation considerably.  ... 
doi:10.1145/1555754.1555800 dblp:conf/isca/SaidiBRM09 fatcat:aphddny6dnc4vk2njw3op6ummi

High speed bulk data transfer using the SSH protocol

Chris Rapier, Benjamin Bennett
2008 Proceedings of the 15th ACM Mardi Gras conference on From lightweight mash-ups to lambda grids: Understanding the spectrum of distributed computing requirements, applications, tools, infrastructures, interoperability, and the incremental adoption of key capabilities - MG '08  
SSH is a highly successful multipurpose protocol used for both interactive shells and transport layer mechanisms.  ...  However, a design choice in most implementations of SSH reduces its functionality as bulk data transport tool in high performance network environments.  ...  This figure demonstrates the impact of RTT (Round Trip Time) on throughput for a fixed 64KiB receive buffer.  ... 
doi:10.1145/1341811.1341824 dblp:conf/mg/RapierB08 fatcat:xrvenhcrjzh7ni76fw4exypusy

Analyzing the Performance of Active Queue Management Algorithms

Ali Ahammed G.F
2010 International Journal of Computer Networks & Communications  
Active queue management (AQM) has been proposed as a router-based mechanism for early detection of congestion inside the network.  ...  In this paper we analyzed several active queue management algorithms with respect to their abilities of maintaining high resource utilization, identifying and restricting disproportionate bandwidth usage  ...  is idle. freeze_time is an important parameter that determines the minimum time interval between two successive updates of Pm.  ... 
doi:10.5121/ijcnc.2010.2201 fatcat:jkvnbrqhdjhf5mnvj4op4zprsy

Frequency-Independent Warning Detection Sequential for Dynamic Voltage and Frequency Scaling in ASICs

Bishnu Prasad Das, Hidetoshi Onodera
2014 IEEE Transactions on Very Large Scale Integration (vlsi) Systems  
In this scheme, the warning window is independent of input clock frequency and hence is suitable for frequency scaling application.  ...  The circuit is helpful to determine when to stop further reduction in supply voltage by producing the warning signal with pre-defined timing slacks in DVFS application.  ...  ACKNOWLEDGEMENT The VLSI chip in this study has been fabricated in the chip fabrication program of VLSI Design and Education Center (VDEC), the University of Tokyo in collaboration with STARC, e-shuttle  ... 
doi:10.1109/tvlsi.2013.2296033 fatcat:pjutdgmkk5bmljjasq6anukg7e

Itelligent Multi-hop Video Communications [chapter]

Yunnan Wu, Anthony Vetro, Huifang Sun, S. -Y. Kung
2001 Lecture Notes in Computer Science  
Preliminary experimental results show a throughput gain of 19.3% on a concatenation of two best-effort networks, and 37.8% for a concatenation of a best-effort network and a guaranteed service network.  ...  In this paper, we present an intelligent multi-hop communications architecture for quality video delivery over networks.  ...  Such an early warning can be useful for the video encoder in that the sender can avoid using it as a reference frame to reduce error propagation.  ... 
doi:10.1007/3-540-45453-5_92 fatcat:kihao6p7obdjvaxwit4dmne5im

On the merits and pitfalls of critical chain scheduling

W Herroelen
2001 Journal of Operations Management  
Using the 50% rule for buffer sizing may lead to a serious overestimation of the project buffer size. The 2a-buffer size assumption does not hold.  ...  The work-in-process impact of the scheduling mechanism used for scheduling the gating tasks is negligible.  ...  Resource buffers usually take the form of an advance warning, i.e. a wake-up call for every new instance of a resource on the critical chain.  ... 
doi:10.1016/s0272-6963(01)00054-7 fatcat:2uobltk4incpbojrrbrbrb6zwi

TCP-Jersey for Wireless IP Communications

K. Xu, Y. Tian, N. Ansari
2004 IEEE Journal on Selected Areas in Communications  
TCP-Jersey consists of two key components, the available bandwidth estimation (ABE) algorithm and the congestion warning (CW) router configuration.  ...  CW is a configuration of network routers such that routers alert end stations by marking all packets when there is a sign of an incipient congestion.  ...  packet arrival time, is the size of packet , and is a constant time window.  ... 
doi:10.1109/jsac.2004.825989 fatcat:znik6vtl5fcrbjcuh4evpx3g2m

Multipath Transmission for the Internet: A Survey

Ming Li, Andrey Lukyanenko, Zhonghong Ou, Antti Yla-Jaaski, Sasu Tarkoma, Matthieu Coudron, Stefano Secci
2016 IEEE Communications Surveys and Tutorials  
Given all these efforts, it is beneficial and timely to summarize the state-of-the-art, compare their pros and cons, and discuss about the future directions.  ...  for each layer, investigate the problems that each layer aims to address, and make comprehensive assessment of the solutions; (3) based on the comparison, we identify open issues and pinpoint future directions  ...  ACKNOWLEDGMENT This work was supported by the Academy of Finland, grant number 278207, and HIIT Distributed and Mobile Cloud Systems research programme.  ... 
doi:10.1109/comst.2016.2586112 fatcat:vnpjtjx2dzfobbtzan5l6nnx7y

The Case for In-Network Replay Suppression

Taeho Lee, Christos Pappas, Adrian Perrig, Virgil Gligor, Yih-Chun Hu
2017 Proceedings of the 2017 ACM on Asia Conference on Computer and Communications Security - ASIA CCS '17  
., source authentication is in place, and our evaluation shows that the threat is pervasive-candidate routers for compromise are in the order of hundreds or thousands.  ...  Then, we devise, analyze, and implement a highly efficient protocol that suppresses replayed traffic at the network layer without global time synchronization.  ...  ACKNOWLEDGMENTS We would like to thank Pawel Szalachowski, Samuel Hitz, and the anonymous reviewers for their insightful feedback and suggestions.  ... 
doi:10.1145/3052973.3052988 dblp:conf/ccs/LeePPGH17 fatcat:3bcajz3rq5d7jjqj4fdaiawqru

A Congestion Control Mechanism for Streaming Media Transmission over Wireless Environment

Hancui Zhang, Shuyu Chen, Qianyun Wang, Jun Liu
2016 International Journal of Multimedia and Ubiquitous Engineering  
Performance evaluation of network efficiency, TCP friendliness and streaming media stability in NS2 simulation platform has shown that it is a good congestion control mechanism for streaming media transmission  ...  The high error rates and large delay of wireless networks result in significant performance degradation and poor quality of the streaming media transmission service in transmission.  ...  Acknowledgements We are grateful to the editors and anonymous reviewers for their valuable comments on this paper. The work of this paper is supported by National Natural Science Foundation of China  ... 
doi:10.14257/ijmue.2016.11.8.27 fatcat:lkcur72gb5ftlkpv4im7bronx4

Performance Comparison of Active Queue Management Techniques

T. Bhaskar Reddy, Ali Ahammed
2008 Journal of Computer Science  
Active Queue Management (AQM) has been proposed as a router-based mechanism for early detection of congestion inside the network.  ...  To keep the stability of the whole network, congestion control algorithms have been extensively studied.  ...  Throughput: The measure of how soon the receiver is able to get a certain amount of data. It is determined as the ratio of the total data received by the end to the connection time.  ... 
doi:10.3844/jcssp.2008.1020.1023 fatcat:emmtp2vkpnckzilzf33if3vouy

Network Traffic Management [chapter]

Thomas M. Chen
2012 Handbook of Computer Networks  
They seek to avoid congestion by limiting the amount of traffic entering the network. Within the network, packets may have different requirements for reliable or timely delivery.  ...  Network resources are shared as needed by a community of users.  ...  A capability for explicit congestion notification is preferable as a method of "early warning."  ... 
doi:10.1002/9781118256107.ch22 fatcat:a5wadplenvhnxmzoyohslmrhe4

Robust and reactive project scheduling: a review and classification of procedures

Willy Herroelen, Roel Leus
2004 International Journal of Production Research  
It is the objective of this paper to review possible procedures for the generation of proactive (robust) schedules, which are as well as possible protected against schedule disruptions, and for the deployment  ...  The vast majority of the research efforts in project scheduling over the past several years has concentrated on the development of exact and suboptimal procedures for the generation of a baseline schedule  ...  an early start based unbuffered projected schedule and report early completions (apply the roadrunner mentality) Use the buffers as a proactive warning mechanism during schedule execution CC/BM builds  ... 
doi:10.1080/00207540310001638055 fatcat:3ai5drfdurfgroby5eieqcu7mu
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