1	MANAGEMENT SUMMARY	5
2	INTRODUCTION	6
2.1	BACKGROUND	6
2.2	SPECIAL TERMINOLOGY	6
3	CURRENT OPERATION	8
3.1	CURRENT BUSINESS PROCESSES AND INFORMATION SYSTEMS	8
3.2	OPERATING SCENARIO	9
3.2.1	ON LINE PROCESSING OF GAS SUPPLIER REQUESTS	9
3.2.2	OVERNIGHT DATA COLLECTION	10
3.2.3	CASH AND METER DATA – BATCH PROCESSING	10
3.3	EXISTING ISSUES	11
4	SCOPE OF THE USER REQUIREMENTS	12
4.1	PURPOSE	12
4.2	AN OVERVIEW OF THE USER REQUIREMENTS	12
4.2.1	SUMMARY OF THE REQUIREMENTS	12
4.2.2	IMPACT ON THE PROCESS	12
5	CONTEXT	14
6	PHASE 1 – BUCKET FILLING	15
6.1	FUNCTIONAL REQUIREMENTS – PHASE 1	16
6.1.1	PERFORM INITIAL DATA CLEANSING	16
6.1.2	FILL BUCKET	17
6.1.3	DELETE PENDING AND DUPLICATE CUSTOMERS FROM CDB	18
6.2	NON FUNCTIONAL REQUIREMENTS – PHASE 1	20
6.2.1	AVAILABILITY	20
6.2.2	SECURITY	20
6.2.3	SLA PERFORMANCE	20
6.2.4	POTENTIAL FOR CHANGE	20
7	PHASE 2 – BUCKET EMPTYING	21
7.1	BUCKET EMPTYING PROCESS OVERVIEW	21
7.2	FUNCTIONAL REQUIREMENTS – PHASE 2	23
7.2.1	RECEIVE AND ENTER DUMMY CQ01	23
7.2.2	EMPTY BUCKET	23
7.2.3	RESEARCH EXCEPTIONS AND CLEAN CDB	25
7.2.4	DELETE OLD BUCKET TRANSACTIONS	29
7.2.5	RECEIVE AND ENTER CQ02	29
7.2.6	UPDATE CDB METER OR GASCARD REFERENCE NUMBER	29
7.2.7	AD HOC REPORTING	30
7.3	NON FUNCTIONAL REQUIREMENTS – PHASE 2	31
7.3.1	AVAILABILITY	31
7.3.2	SECURITY	31
7.3.3	SLA PERFORMANCE	31
7.3.4	POTENTIAL FOR CHANGE	31
7.3.5	MISCELLANY	31
8	DATA REQUIREMENTS	33
8.1	BUCKET CUSTOMER RECORD	33
9	VOLUMETRICS	33