Structured Analysis Lec 4 - Structured Systems Analysis:...

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Unformatted text preview: Structured Systems Analysis: Structured Systems Analysis: ransform Descriptions ransform Descriptions Transform Descriptions Transform Descriptions Structured English Structured English EGA/ERLJ IE 154 Objectives for Today r Describe Structured English r Relate Structured English to DFDs r Know the Constructs of Structured English r Know the Vocabulary of Structured nglish English r Know the Conventions of Structured English r Solve an Example Tools Used to Describe Policy 1. Decision Trees 2. Decision Tables 3. Structured English Structured English r Structured English is a specification language that makes use of a limited vocabulary and a limited syntax Structured English r The limited vocabulary of Structured English consists only of: c Imperative English language verbs c Terms defined in the data dictionary c Certain reserved words for logic formulation Syntax of Structured English r The syntax of a Structured English statement is limited to: c Simple declarative sentences c Closed-end decision constructs c Closed-end repetition constructs c Combinations of the above Objectives for Today r Describe Structured English r Relate Structured English to DFDs r Know the Constructs of Structured English r Know the Vocabulary of Structured nglish English r Know the Conventions of Structured English r Solve an Example Example For each NEW-STOCK-RQST 1. Find AUTH-FORM such that REF-N equal to RQST-N of NEW-STOCK-RQST. 2. If no match , Discard NEW-STOCK-RQST as INV-NEW-STOCK- RQST Otherwise Write PURCH-ORDER for ORDRD-ITEM. Select SUPPLIER for which ORDERED-ITEM appears in SPLR-CATALOG-ENTRY. Copy SUPLR-N and SUPLR-ADD onto PURCH-ORDER. Copy PURCH-ORDER-N onto NEW-STOCK-REQUEST. File NEW-STOCK-REQUEST with AUTH-FORM Process No.: 3.3.1 Process Name: Order New Stock Structured English r Structured English does not include the following 1. Qualifiers such as adjectives and adverbs 2. Compound sentence structures...
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Structured Analysis Lec 4 - Structured Systems Analysis:...

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