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TRANSFORM ANALYSIS

This document provides a comprehensive analysis of the Data Flow Diagram (DFD) for the "Patient Information System." The DFD outlines the processes involved in retrieving, computing, and updating patient information. It details the structure chart that accompanies the system, highlighting the various components and their interactions. Essential functions include handling queries, updates, alarms, and feedback mechanisms. The abbreviations used in the system are explained, providing clarity for understanding the flow of patient data and the handling of errors.

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TRANSFORM ANALYSIS

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  1. TRANSFORM ANALYSIS An Example

  2. The DFDused in this example is the “Patient Information System”from section 2c.The resulting Structure Chartis described on the following pages.

  3. patient information system 0 AD PI PI AD AQ Q+ Q+ U+ AQ UR U+ UR get patient info compute patient info produce query/update outputs 1 2 3

  4. get patient info 1 PI U+ Q+ check & accum. PDR read & check Query read & check Update 1.1 1.2 1.3

  5. check & accum. PDR 1.1 PI PDRI PDR_OK? PDRI PDRI PDRI PDREI PDREI read PDR check PDR error-hdlg for PDR accum. PDR 1.1.1 1.1.2 1.1.3 1.1.4 PDR- PDR CRT

  6. read & check Query 1.2 QI QI QI Q_OK? QEI QEI read Query check Query error-handling for Query 1.2.1 1.2.2 1.2.3 Query- Query CRT

  7. read & check Update 1.3 UI UI UI U_OK? UEI UEI read Update check Update error-handling for Update 1.3.1 1.3.2 1.3.3 Update- Update CRT

  8. compute patient info 2 PI Q+ U+ AQ UR AD evaluate Alarm process Request 2.1 2.2 AD UR ND U+ AQ ORD Q+ handle Alarm process Pat. process Query process Update 2.1.1 2.1.2 2.2.1 2.2.2 STD CT NT Summary PH patient db

  9. produce query/update outputs 3 AD UR AQ answer Query give Alarm give Feedback 3.1 3.2 3.3 AO FQ FU CRT

  10. PDR ... Patient Data Record PDRI ... PDR-I(nternal) PDREI ... PDR-Error-Info PI ... Patient Input ND ... Normal Data STD ... stat. Data ORD ... out-of-range Data AD ... Alarm Data AO ... Alarm-Output Q+ ... Query+ QI ... Query-I(nternal) QEI ... Query-Error-Info U+ ... Update+ UI ... Update-I(nternal) UEI ...Update-Error-Info PH ... Patient History CT ... Current Treatment NT ... New Treatment UR ... Update-Result AQ ... Answer to Query FQ ... Feedback-Query FU ... Feedback-Update Abbreviations used in the SC

  11. End of Section 3f

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