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Legacy systems: managing evolution through integration in a distributed and object-oriented computing environment

D Lemaitre1, D Sauquet, I Fofol

  • 1Medical Informatics Department, Broussais University Hospital, Paris.

Proceedings. Symposium on Computer Applications in Medical Care
|January 1, 1995
PubMed
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This study details a two-phase strategy for evolving legacy healthcare systems. It involves component separation and adopting object-oriented databases for modern software management.

Area of Science:

  • Software Engineering
  • Health Informatics
  • Information Systems Management

Background:

  • Legacy systems are critical for organizational functions but face obsolescence due to aging and new technologies.
  • Managing the evolution of these systems is a significant challenge in software engineering.
  • Broussais University Hospital in Paris sought to modernize a healthcare unit management system.

Purpose of the Study:

  • To present a practical strategy for evolving a legacy healthcare management system.
  • To describe a two-phase approach for system modernization.
  • To illustrate the application of the strategy with a case study.

Main Methods:

  • The strategy involves a two-phase evolution pathway.
  • Phase 1: Decoupling the interface from data storage and application control, implementing a communication channel between components.

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  • Phase 2: Replacing the homegrown system with an object-oriented database management system (DBMS).

    • Main Results:

    • The described strategy facilitates the evolution of legacy healthcare systems.
    • Component separation and communication channels enhance system modularity.
    • Adoption of an object-oriented DBMS modernizes data management and application control.
    • A successful application example for managing hypertensive patients was developed.

    Conclusions:

    • The proposed two-phase strategy offers a viable approach for modernizing critical legacy healthcare systems.
    • This method addresses the challenges of system aging and technological advancement.
    • The strategy promotes flexibility and maintainability in health informatics systems.