NASA Scientific and Technical Aerospace Reports

20040070937 NASA Langley Research Center, Hampton, VA, USA
Future Air Traffic Growth and Schedule Model User’s Guide
Kimmel, William M., Technical Monitor; Smith, Jeremy C.; Dollyhigh, Samuel M.; May 2004; 26 pp.; In English
Contract(s)/Grant(s): NAS1-00135; WU 23-762-45-E2
Report No.(s): NASA/CR-2004-213027; No Copyright; Avail: CASI; A03, Hardcopy
The Future Air Traffic Growth and Schedule Model was developed as an implementation of the Fratar algorithm to project
future traffic flow between airports in a system and of then scheduling the additional flights to reflect current passenger
time-of-travel preferences. The methodology produces an unconstrained future schedule from a current (or baseline) schedule
and the airport operations growth rates. As an example of the use of the model, future schedules are projected for 2010 and
2022 for all flights arriving at, departing from, or flying between all continental USA airports that had commercial scheduled
service for May 17, 2002. Inter-continental US traffic and airports are included and the traffic is also grown with the Fratar
methodology to account for their arrivals and departures to the continental US airports. Input data sets derived from the Official
Airline Guide (OAG) data and FAA Terminal Area Forecast (TAF) are included in the examples of the computer code
execution.
Author
Air Traffıc; Airline Operations; Algorithms; Computer Programs
20040071074 NASA Stennis Space Center, Bay Saint Louis, MS, USA, Lockheed Martin Space Operations, Bay Saint
Louis, MS, USA
Software for Estimating Costs of Testing Rocket Engines
Hines, Merlon M.; January 2004; 1 pp.; In English
Report No.(s): NASA/NP-2002-06-00024; SSC-00154; No Copyright; Avail: CASI; A01, Hardcopy
A high-level parametric mathematical model for estimating the costs of testing rocket engines and components at Stennis
Space Center has been implemented as a Microsoft Excel program that generates multiple spreadsheets. The model and the
program are both denoted, simply, the Cost Estimating Model (CEM). The inputs to the CEM are the parameters that describe
particular tests, including test types (component or engine test), numbers and duration of tests, thrust levels, and other
parameters. The CEM estimates anticipated total project costs for a specific test. Estimates are broken down into testing
categories based on a work-breakdown structure and a cost-element structure. A notable historical assumption incorporated
into the CEM is that total labor times depend mainly on thrust levels. As a result of a recent modification of the CEM to
increase the accuracy of predicted labor times, the dependence of labor time on thrust level is now embodied in third- and
fourth-order polynomials.
Author
Mathematical Models; Program Verification (Computers); Computer Programs; Cost Estimates; Engine Tests
20040071079 NASA Stennis Space Center, Bay Saint Louis, MS, USA, Lockheed Martin Corp., Bay Saint Louis, MS, USA
Software Assists in Extensive Environmental Auditing
Callac, Christopher; Matherne, Charlie; Selinsky, T.; September 26, 2002; 1 pp.; In English
Report No.(s): NASA/NP-2002-10-00039; SSC-00180; No Copyright; Avail: CASI; A01, Hardcopy
The Base Environmental Management System (BEMS) is a Web-based application program for managing and tracking
audits by the Environmental Office of Stennis Space Center in conformity with standard 14001 of the International
Organization for Standardization (ISO 14001). (This standard specifies requirements for an environmental-management
system.) BEMS saves time by partly automating what were previously manual processes for creating audit checklists;
recording and tracking audit results; issuing, tracking, and implementing corrective-action requests (CARs); tracking
continuous improvements (CIs); and tracking audit results and statistics. BEMS consists of an administration module and an
auditor module. As its name suggests, the administration module is used to administer the audit. It helps administrators to edit
the list of audit questions; edit the list of audit locations; assign mandatory questions to locations; track, approve, and edit
CARs; and edit completed audits. The auditor module is used by auditors to perform audits and record audit results: it helps
the auditors to create audit checklists, complete audits, view completed audits, create CARs, record and acknowledge CIs, and
generate reports from audit results.
Author
Environment Management; Management Systems; Computer Programs
193