PubMed Health⌕ Search

PubMed · 10144457

A systems engineering approach to technology assessment.

Abstract

This paper presents a technology assessment process based on systems engineering methodologies used in the aerospace and defense industries. Systems engineering, defined in the U.S. military manual for engineering management, is a logical sequence of activities and decisions transforming an operational need into a description of system performance parameters and a preferred system configuration. Like systems engineering, technology assessment is driven by a single, clear need. The objective of systems engineering is to design a new system configuration; technology assessment assesses existing technologies to address this need. A six-step technology assessment model based on systems engineering principles is presented, including: (1) needs assessment; (2) clinical feasibility analysis; (3) systems assessment; (4) approval; (5) implementation; and (6) follow-up/CQI.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

A T Crepea. A systems engineering approach to technology assessment.. https://doi.org/10.1097/00004669-199507000-00014

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Optimal design of non-Newtonian, micro-scale viscous pumps for biomedical devices.

The present paper addresses the numerical optimization of geometrical parameters of non-Newtonian micro-scale viscous pumps for biomedical devices. The objective is to maximize the mass flow rate per unit of shaft power consumed by the rotor when an external pressure load is applied along the channel that houses the rotor. Two geometric parameters are considered in the optimization process: (i) the height of the channel that houses the rotor (H) and (ii), the eccentricity (epsilon) of the rotor. Three different micro-scale viscous pump configurations were tested: a straight-housed pump (I-shaped housing) and two curved housed pumps (L- and U-shaped housings). The stress-strain constitutive law is modeled by a power-law relation. The results show that the geometric optimization of micro-scale viscous pumps is critical since the mass flow rate propelled by the rotor is highly dependent on epsilon and H. Numerical simulations indicate that mass flow rate is maximized when epsilon approximately 0, namely when the rotor is placed at a distance of 0.05 radii from the lower wall. The results also show that micro-scale viscous pumps with curved housing provide higher mass flow rate per unit of shaft power consumed when compared with straight-housed pumps. The results are presented in terms optimized dimensions of all three configurations (i.e., H(opt) and epsilon(opt)) and for values of the power-law index varying between 0.5 (shear thinning fluids) and 1.5 (shear-thickening fluids).

Biomedical Engineering↗