We model a project network that uses common methods of improvised explosives and metallic liner manufacture for the purposes of constructing anti-armor IEDs. Separately, we model a network utilizing advanced 3D printing technology for the same ends. We then introduce an interdiction extension to both project models. By utilizing decision critical path method models, we examine the differences in the critical paths of both project networks. Our finding of note is that the length of the network...
Topics: disruptive technology, critical path method, PERT, IED, optimization, defender-attacker
Current mission preparation and analysis methods place an undue burden of effort on conventional and special operations forces to effectively synchronize and execute their increasingly complex operational responsibilities in a rapidly changing global environment. This thesis developed a tool for the United States Special Operations Command (USSOCOM) in support of their Mission Planning, Analysis, Rehearsal, and Execution (MPARE) initiative to allow special operations forces commanders and...
Topics: Mission Planning, Analysis, Synchronization, Critical Path Method, CPM, Special Operations, MPARE,...
1,401
1.4K
Jul 23, 2010
07/10
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Jacklin, Stephen A.; Leyland, Jane Ann
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A test was conducted to assess the capabilities of a small scale rotor test rig for implementing higher harmonic control and stability augmentation algorithms. The test rig uses three high speed actuators to excite the swashplate over a range of frequencies. The actuator position signals were monitored to measure the response amplitudes at several frequencies. The ratio of response amplitude to excitation amplitude was plotted as a function of frequency. In addition to actuator performance,...
Topics: DEMODULATION, CRITICAL PATH METHOD, DIGITAL SYSTEMS, TRANSPONDERS, UPLINKING, DEMULTIPLEXING,...
This thesis examines seasheds as a method for carrying non- containerizable military cargo on commercial containerships in the U.S. merchant marine fleet.. Seasheds are enhancement features for containerships that convert them for the purpose of carrying
Topics: Seasheds, Flatracks, containerships, strategic sealift, critical path method, sealift enhancement...
This thesis describes the development of a microcomputer project management y=system for the Space Systems Academic Group (SSAG) at the Naval Postgraduate School. The focus of this paper is on system requirements and implementation to manage Project ORION. Project PRION is a high-technology mini-satellite venture under direction of the SSAG. It involved the design, procurement, fabrication and testing of the satellite in the planning, scheduling and controlling phases of project management....
Topics: Project management, Project ORION, Microcomputer, Satellite, Matrix organization, Computer-aided,...
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77
May 5, 2017
05/17
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AD Publications
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— There are two common used methods to find the minimum completion time for a project scheduling. These methods are Critical Path Method (CPM) and Program Evaluation Review Technique (PERT). In CPM, a network diagram, which is Activity on Node (AON), is drawn and the slack time for every activity is calculated such that the project's critical path could be found. It is important that the critical path can suggest the shortest possible completion time. On the other hand, PERT concerns on...
Topics: Activity on Node, Critical Path Method, Program Evaluation Review Technique, Probabilistic...
The Space Launch System (SLS) Program is essential to achieving the Nation's and NASA's goal of human exploration and scientific investigation of the solar system. As a multi-element program with emphasis on safety, affordability, and sustainability, SLS is becoming America's next great ship of exploration. The SLS Core Stage includes avionics, main propulsion system, pressure vessels, thrust vector control, and structures. Boeing manufactures and assembles the SLS core stage at the Michoud...
Topics: NASA Technical Reports Server (NTRS), SPACE PROGRAMS, MANUFACTURING, SAFETY, PROJECT MANAGEMENT,...
This presentation demonstrates how the ASRC Scheduling team developed working practices to support multiple NASA and ASRC Project Managers using the enterprise capabilities of Primavera P6 and P6 Web Access. This work has proceeded as part of Kennedy Ground Systems' preparation for its transition from the Shuttle Program to the Constellation Program. The presenters will cover Primavera's enterprise-class capabilities for schedule development, integrated critical path analysis, and reporting, as...
Topics: NASA Technical Reports Server (NTRS), PROJECT PLANNING, SCHEDULING, CONSTELLATION PROGRAM, MANNED...
In Fiscal Year 2011 Dryden Flight Research Center (DFRC) implemented a new project management system called Critical Chain Project Management (CCPM). Recent NASA audits have found that the Dryden workforce is strained under increasing project demand and that multi-tasking has been carried to a whole new level at Dryden. It is very common to have an individual work on 10 different projects during a single pay period. Employee surveys taken at Dryden have identified work/life balance as the...
Topics: NASA Technical Reports Server (NTRS), PROJECT MANAGEMENT, MANAGEMENT SYSTEMS, PROJECT PLANNING,...
Currently, the most common approach used in project planning tools is the Critical Path Method (CPM). While this method was a great improvement over the basic Gantt chart technique being used at the time, it now suffers from three primary flaws: (1) task duration is an input, (2) productivity impacts are not considered , and (3) management corrective actions are not included. Today, computers have exceptional computational power to handle complex simulations of task e)(eculion and project...
Topics: NASA Technical Reports Server (NTRS), PROJECT MANAGEMENT, SIMULATION, COST ESTIMATES, CRITICAL PATH...
The Bioastronautics Critical Path Roadmap is the framework used to identify and assess the risks to crews exposed to the hazardous environments of space. It guides the implementation of research strategies to prevent or reduce those risks. Although the BCPR identifies steps that must be taken to reduce the risks to health and performance that are associated with human space flight, the BCPR is not a "critical path" analysis in the strict engineering sense. The BCPR will evolve to...
Topics: NASA Technical Reports Server (NTRS), BIOASTRONAUTICS, AEROSPACE ENVIRONMENTS, PROJECT MANAGEMENT,...
One of the most recent techniques for propagating resource constraints in Constraint Based scheduling is Energy Constraint. This technique focuses in precedence based scheduling, where precedence relations are taken into account rather than the absolute position of activities. Although, this particular technique proved to be efficient on discrete unary resources, it provides only loose bounds for jobs using discrete multi-capacity resources. In this paper we show how mutual exclusion reasoning...
Topics: NASA Technical Reports Server (NTRS), EXCLUSION, PROPAGATION, CRITICAL PATH METHOD, MATHEMATICAL...
Thios report summarizes the chronology, results, and lessons learned from the development of the SSFF-MIS. This system has been nearly two years in development and has yielded some valuable insights into specialized MIS development. Attachment A contains additions, corrections, and deletions by the COTR.
Topics: NASA Technical Reports Server (NTRS), MANAGEMENT INFORMATION SYSTEMS, SYSTEMS ENGINEERING,...
This report summarizes the chronology, results, and lessons learned from the development of the SSFF-MIS. This system has been nearly two years in development and has yielded some valuable insights into specialized MIS development. General: In December of 1994, the Camber Corporation and Science Applications International Corporation (SAIC) were contracted to design, develop, and implement a MIS for Marshall Space Flight Center's Space Station Furnace Facility Project. The system was to be...
Topics: NASA Technical Reports Server (NTRS), SPACE STATIONS, FURNACES, CAMBER, SYSTEMS ENGINEERING,...
POINTS (Precision Optical INTerferometer in Space) would perform microarcsecond optical astrometric measurements from space, yielding submicroarcsecond astrometric results from the mission. It comprises a pair of independent Michelson stellar interferometers and a laser metrology system that measures both the critical starlight paths and the angle between the baselines. The instrument has two baselines of 2 m, each with two subapertures of 35 cm; by articulating the angle between the baselines,...
Topics: NASA Technical Reports Server (NTRS), OPTICAL MEASURING INSTRUMENTS, ASTROMETRY, OPTICAL...
In recent years a variety of space-activity schedulers have been developed within the aerospace community. Space-activity schedulers are characterized by their need to handle large numbers of activities which are time-window constrained and make high demands on many scarce resources, but are minimally constrained by predecessor/successor requirements or critical paths. Two needs to exchange data between these schedulers have materialized. First, there is significant interest in comparing and...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE INDUSTRY, CRITICAL PATH METHOD, INTERNATIONAL SPACE...
The following topics are discussed concerning scheduling: (1) milestone scheduling; (2) network scheduling; (3) program evaluation and review technique; (4) critical path method; (5) developing a network; (6) converting an ugly duckling to a swan; (7) network scheduling problem; (8) (9) network scheduling when resources are limited; (10) multi-program considerations; (11) influence on program performance; (12) line-of-balance technique; (13) time management; (14) recapitulization; and (15)...
Topics: NASA Technical Reports Server (NTRS), CRITICAL PATH METHOD, MANAGEMENT METHODS, MULTIPROGRAMMING,...
This report describes Aerojet's methods and procedures used to control and administer contractual schedules for the EOS/AMSU-A program. Included are the following: the master, intermediate, and detail schedules; critical path analysis; and the total program logic network diagrams.
Topics: NASA Technical Reports Server (NTRS), EARTH OBSERVING SYSTEM (EOS), MICROWAVE SOUNDING, PROJECT...
The technical requirements and performance of a first generation space interferometer is discussed. The performance of an interferometer, sensitivity, field of view, dynamic range, astrometric accuracy, etc, in space is set by what cannot be achieved for a ground-based instrument. For the Orbiting Space Interferometer (OSI), the nominal performance parameters are 20 mag sensitivity, field of view of approximately 500*500 pixels, a 1000:1 dynamic range in the image with one milliarcsec...
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, FAINT OBJECTS, OPTICAL PATHS, OSO, STELLAR...
The problem of finding the distribution of the shortest path length through a stochastic network is investigated. A general algorithm for determining the exact distribution of the shortest path length is developed based on the concept of conditional factoring, in which a directed, stochastic network is decomposed into an equivalent set of smaller, generally less complex subnetworks. Several network constructs are identified and exploited to reduce significantly the computational effort required...
Topics: NASA Technical Reports Server (NTRS), COMMUNICATION NETWORKS, CRITICAL PATH METHOD, DATA LINKS,...
A FORTRAN program describing the vibration modes of a rotor-bearing system is analyzed for parellelism in this simulation using a Pascal-like structured language. Potential vector operations are also identified. A critical path through the simulation is identified and used in conjunction with somewhat fictitious processor characteristics to determine the time to calculate the problem on a parallel processing system having those characteristics. A parallel processing overhead time is included as...
Topics: NASA Technical Reports Server (NTRS), COMPUTERIZED SIMULATION, PARALLEL PROCESSING (COMPUTERS),...
An investigation performed for NASA LeRC by COMSAT Labs, of a digitally implemented on-board demultiplexer/demodulator able to process a mix of uplink carriers of differing bandwidths and center frequencies and programmable in orbit to accommodate variations in traffic flow is reported. The processor accepts high speed samples of the signal carried in a wideband satellite transponder channel, processes these as a composite to determine the signal spectrum, filters the result into individual...
Topics: NASA Technical Reports Server (NTRS), DEMODULATION, DEMULTIPLEXING, MULTICHANNEL COMMUNICATION,...
Some path-following techniques are described and compared with other methods. Use of multipurpose techniques that can be used at more than one stage of the path-following computation results in a system that is relatively simple to understand, program, and use. Comparison of path-following methods with the method of parametric differentiation reveals definite advantages for the path-following methods. The fact that parametric differentiation has found a broader range of applications indicates...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMMING, CRITICAL PATH METHOD, DIFFERENTIAL...
The design and construction of embedded operating systems for real-time advanced aerospace applications was investigated. The applications require reliable operating system support that must accommodate computer networks. Problems that arise in the construction of such operating systems, reconfiguration, consistency and recovery in a distributed system, and the issues of real-time processing are reported. A thesis that provides theoretical foundations for the use of atomic actions to support...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE ENGINEERING, COMPUTER NETWORKS, EMBEDDING, FAULT...
An interactive fracture mechanics program was developed in BASIC minima on a CBM 4032 microcomputer. It furnishes stress intensity factors and the critical size of a flaw.
Topics: NASA Technical Reports Server (NTRS), COMPUTER SYSTEMS PROGRAMS, FRACTURE MECHANICS,...
The use of auditory displays for selected cockpit instruments was examined. In auditory, visual, and combined auditory-visual compensatory displays of a vertical axis, critical tracking task were studied. The visual display encoded vertical error as the position of a dot on a 17.78 cm, center marked CRT. The auditory display encoded vertical error as log frequency with a six octave range; the center point at 1 kHz was marked by a 20-dB amplitude notch, one-third octave wide. Asymptotic...
Topics: NASA Technical Reports Server (NTRS), AUDITORY TASKS, CRITICAL PATH METHOD, DISPLAY DEVICES, MANUAL...
The measurement of rainfall by remote sensors is investigated. One parameter radar rainfall measurement is limited because both reflectivity and rain rate are dependent on at least two parameters of the drop size distribution (DSD), i.e., representative raindrop size and number concentration. A generalized rain parameter diagram is developed which includes a third distribution parameter, the breadth of the DSD, to better specify rain rate and all possible remote variables. Simulations show the...
Topics: NASA Technical Reports Server (NTRS), DROP SIZE, PARTICLE DENSITY (CONCENTRATION), PARTICLE SIZE...
Several existing computer programs for estimating life cycle cost of mining systems were evaluated. A commercially available program, ADAM/1 was found to be satisfactory in relation to the needs of the advanced coal extraction project. Two test cases were run to confirm the ability of the program to handle nonconventional mining equipment and procedures. The results were satisfactory. The model, therefore, is recommended to the project team for evaluation of their conceptual designs.
Topics: NASA Technical Reports Server (NTRS), COAL, COMPUTER PROGRAMS, MINING, BOREHOLES, COMPUTERIZED...
The Network Generation Program (NETGEN), which creates logic networks from task chart data is presented. NETGEN is written in CDC FORTRAN IV (Extended) and runs in a batch mode on the CDC 6000 and CYBER 170 series computers. Data is input via a two-card format and contains information regarding the specific tasks in a project. From this data, NETGEN constructs a logic network of related activities with each activity having unique predecessor and successor nodes, activity duration, descriptions,...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, CRITICAL PATH METHOD, LOGIC CIRCUITS,...
The method proposed tries to enumerate all the critical fault-patterns (successive occurrences of failures) without analyzing every single possible fault. The conditions for the system to be operating in a given mode can be expressed in terms of the static states. Thus, one can find all the system states that correspond to a given critical mode of operation. The next step consists in analyzing the fault-detection mechanisms, the diagnosis algorithm and the process of switch control. From them,...
Topics: NASA Technical Reports Server (NTRS), CRITICAL PATH METHOD, DIGITAL SYSTEMS, FAILURE ANALYSIS,...
If a set of N points or nodes with a nonnegative cost associated with each ordered pair is known, it is desired to find a path from one given node to another given node which minimizes the cost sum. An algorithm is presented which yields a global minimum solution after at most N - 1 iterations or on a typical large third-generation computer, after 1 hour of computation time for a 10,000-node problem. The rapid-access data storage capacity demanded by the algorithm is approximately 3N words for...
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, CRITICAL PATH METHOD, HUYGENS PRINCIPLE, COST...
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264
Jul 26, 2010
07/10
by
Schenk, Axel; Pappa, Richard S
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Work performed under a collaborative research effort between NASA and the German Aerospace Research Establishment (DLR) is summarized. The objective is to develop and demonstrate advanced technology for system identification of future large space structures. Recent experiences using the eigensystem realization algorithm (ERA) for modal identification of Mini-Mast are reported. Mini-Mast is a 20-meter-long deployable space truss used for structural dynamics and active-vibration control research...
Topics: COMMUNICATION NETWORKS, CRITICAL PATH METHOD, DATA LINKS, STOCHASTIC PROCESSES, ALGORITHMS, DATA...
The National Open University of Nigeria (NOUN) is Nigeria's only university dedicated to providing education through the use of distance instructional methods. So far, however, the lack of availability and poor distribution of course materials, which underpin instructional delivery at NOUN, continue to be hindrances to achieving the university's vision and mission. There are delays and difficulties in developing and distributing materials to students and Study Centres. Many pioneer students...
Topics: ERIC Archive, Open Universities, Teaching Methods, Foreign Countries, Performance Factors,...
Both publicly and privately funded research projects managed by universities are growing in size and scope. Complex, large-scale projects (over $50 million) pose new management challenges and risks for universities. This paper explores the relationship between project success and a variety of factors in large-scale university projects. First, we characterize the challenge of large-scale university research project management, synthesize findings from the literature, and identify research gaps....
Topics: ERIC Archive, Research Projects, Risk, Risk Management, Performance Factors, Research...
Conventional wisdom may support the presumed notion that higher expectations increase efficiency and improve quality. However, this claim may only be validated when workers are equipped with appropriate tools, training, and a conducive work environment. This study implements various interventions, observes outcomes, and analyzes data collected in three different institutions between 2003 and 2010. To increase efficiency and improve quality in research administration, an...
Topics: ERIC Archive, Efficiency, Educational Quality, Educational Improvement, Research Administration,...
Preparing for every possible contingency seems daunting, but with teamwork and some help from the government, it's almost do-able. There is a great system out there that will help business professionals and educators develop a strong, effective emergency preparedness plan. If they haven't done a good job of implementing a solid emergency response plan, they are opening themselves up to a vast amount of litigation and liability. There has never been a better time to revisit the issue of...
Topics: ERIC Archive, Emergency Programs, Information Sources, Guidelines, Crisis Management, Natural...
This article describes a 21st century how-to model for successful career and technical education (CTE) programs. The Geometry in Construction program is the brainchild of two educators, a CTE and a math teacher, who wanted to design a rigorous geometry course taught through a project-based curriculum. This article discusses how they did it, and how one can use the basic principles they outline to do some core content integration of one's own.
Topics: ERIC Archive, Construction Programs, Geometry, Vocational Education, Alignment (Education), Models,...
Procedures, financial controls and reports, and leadership are the three major components that "set the tone" for an effective, accountable, and ethical organization. Procedures must be formally documented instead of passed down verbally on the premise that "we've always done it this way." Meaningful management reports should be developed and shared across the organization. Finally, upper management must assert leadership and challenge the status quo if the organization is...
Topics: ERIC Archive, Accountability, Ethics, Leadership, Program Implementation, Organizational Culture,...
Every August for the past six years, teachers at Walled Lake Consolidated Schools in Michigan learn how to use the latest educational technology tools from their colleagues during the district's one-day technology conference called Spice It Up! The teachers are both the presenters and the attendees, and they have a shared goal of moving the district forward and ensuring that teachers and administrators understand why staff and students must have access to and use technology every day. In this...
Topics: ERIC Archive, Educational Technology, Conferences (Gatherings), Cooperative Planning, Professional...
In 2007-8 the Australian Catholic University (ACU National), undertook a project to develop new resources to provide training and support in eLearning for staff and students. The project was undertaken by a multidisciplinary team drawn from all six campuses and was led by an externally contracted Project Manager/eLearning specialist. This reflective case study reports on how the use of ACU's project management methodology and the selection of a matrix organisation for the project, resulted in...
Topics: ERIC Archive, Electronic Learning, Higher Education, Communities of Practice, Program...
Chairing the annual Mountain Plains Adult Education Association Conference for 250 adult educators in Coeur d'Alene this past spring provided an opportunity for the author to offer a hands-on, conference planning experience to graduate students. Wanting to try something outside the typical classroom experience, the author organized a special topics course on conference planning which could provide experiential learning that not only espoused but also employed adult learning principles in an...
Topics: ERIC Archive, Graduate Students, Experiential Learning, Adult Learning, Educational Principles,...
The process through which teachers transform the curriculum over time is best explained by incremental change theories. Teachers will tinker at the margins of the curriculum, effecting incremental change, until they begin to feel comfortable with the dissolution of disciplinary boundaries, and they are willing to cede control of some curricular decisions to their students. Curricular change does not have to be sudden or revolutionary, nor does it have to involve an entire team of teachers....
Topics: ERIC Archive, Curriculum Development, Curriculum Design, Educational Change, Integrated Curriculum,...
Focusing on the developmental needs of early career postdoctoral fellows--the lifeblood of an internationally competitive research-intensive university--this paper suggests an inextricably linked, two pronged approach to improving research performance at Australian universities. The first is to reconceptualise post-PhD research pathways and in doing so conceive a mechanism for creating new postdoctoral positions; the second is to develop a coherent programme of policies, processes and practices...
Topics: ERIC Archive, Postdoctoral Education, Foreign Countries, Research Universities, Training Methods,...
This paper is concerned with the pathways students take through their studies at university. A critique of current research demands a fresh approach to explaining student progression, in particular within Australian higher education. To date, theories of student progression commonly consider the fit of the person to the university environment within one rather homogeneous socio-cultural milieu. Socio-ecological approaches provide a new, more appropriate framework for investigating the...
Topics: ERIC Archive, Undergraduate Students, Higher Education, Student Characteristics, Foreign Countries,...
Increasingly, public health promotion is about more than influencing individual behavior. Rather, it is equally important to undertake efforts to impact social, environmental, and political factors. Having a clear understanding of the inner workings of the legislative process enhances one's ability to effectively influence policy. It is important to know who can use information from public health and related professions, what type of information to provide, when, and how. With that in mind,...
Topics: ERIC Archive, Health Education, Health Promotion, Public Health, Public Policy, Activism, Access to...
For educators interested in engaging in critical literacy work with families and schools, the efforts can be both exhilarating and exasperating. Reflecting on a two-year family literacy project, we consider the possibilities and pitfalls of the projects' design and implementation. The work described in this article takes a stance that is both critical and grounded in the notion of "funds of knowledge." We propose a framework to assist in the creation and evaluation of family literacy...
Topics: ERIC Archive, Family Literacy, Formative Evaluation, Community Education, Critical Path Method,...
Brian Martin describes a difficult committee meeting he once attended which consisted of one representative from each department. When the meeting ended it left a bitter taste for many who participated. Having learned from this experience, Martin became a chair of the committee and tried a new system that overcame many of the previous problems. The meetings for ranking scholaships and grant applications were shorter, and less contentious. The method is called "ranking by medians", and...
Topics: ERIC Archive, Scholarship, Meetings, Classification, Grantsmanship, Critical Path Method, College...
This article presents a protocol change leaders can use to navigate whole-system change in their school districts. The information describing the protocol will help change leaders in school districts and policymakers interested in whole-district change answer the question, "How do we transform our entire school system"? The protocol is called Step-Up-To-Excellence (SUTE; Duffy, 2002, 2003, 2004a, 2004b, 2004c). Every time SUTE is presented to an audience there is at least one person...
Topics: ERIC Archive, School District Reorganization, Organizational Change, Change Strategies, Critical...
Due to the expected influx of veterans attending college, it is critical that higher education not only be cognizant of the projected growth but also take a proactive stand and properly plan for these students' success. Academic planning begins with advising professionals developing open communications and becoming equipped to guide veteran students through the matriculation process. Veteran students often have difficulty interpreting university scheduling and frequently have access to only a...
Topics: ERIC Archive, Veterans, Success, College Planning, Academic Advising, Mixed Methods Research,...
Critical Chains project management focuses on holding buffers at the project level vs. task level, and managing buffers as a project resource. A number of studies have shown that Critical Chain project management can significantly improve organizational schedule fidelity (i.e., improve the proportion of projects delivered on time) and reduce average project duration, by reducing the unproductive time spent waiting for predecessor tasks to complete. Classroom exposition of Critical Chains...
Topics: ERIC Archive, Critical Path Method, Program Administration, Manufacturing, Teaching Methods,...
