The document discusses an inventory control system. It includes data flow diagrams, system flowcharts, and screen designs. The system uses hierarchical input process output diagrams to define procedures and operations from general to specific. The main control module is "Manage Inventory" which accepts transactions and calls subordinate modules for updating stocks, generating reports, and managing data. Lower level modules are identified relative to their parent modules. Data diagrams provide more detail on processes like sales, shipments, and returns. The program flowchart and screen designs further outline the system.

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CHAPTER II
SYSTEM ANALYSIS
2.1 Data Flow Diagram

2. 2.1.1 Context Diagram
Manual Purchase
Invoice
INVENTORY
SYSTEM
CUSTOMER

3. Overstock Sale Item
Shortage Reorder
Reorder Shipment
2.1.2 Exploded DFD
SUPPLIERMANAGER

4. 2.2 System Flowchart

5. 1.0 Manage
Inventory
CHAPTER III
SYSTEM DESIGN
3.1 Hierarchical Input Process Output (HIPO)
Hierarchy plus Input-Process-Output (HIPO) diagrams enable analysts to define
procedures and operations in a hierarchical manner, correlating input, processing, and output
steps with the integrated whole expressed in the visual table of contents.
3.1.1 VTOC
The Visual Table of Contents (VTOC) shows a hierarchy in which the level of detail
increases from the top of the chart to the bottom, moving from the general to specific. This is
also called top-down development.

6. Figure 1 A hierarchy chart for an interactive inventory control program.
At the top of Figure 1 is the main control module, Manage inventory (module 1.0). It
accepts a transaction, determines the transaction type, and calls one of its three
subordinates (modules 2.0, 3.0, and 4.0).
Lower-level modules are identified relative to their parent modules; for example,
modules 2.1, 2.2, and 2.3 are subordinates of module 2.0, modules 2.1.1, 2.1.2, and
2.1.3 are subordinates of 2.1, and so on. The module names consist of an active verb
followed by a subject that suggests the module’s function.
3.1.2 IPO (Detail)
Data diagram for 2.0 Update Stocks
Process:Opening
of ProcessSale
Reports
Output:Process
Sale Records
Form (Add,Save
Sales)
Input:Press
Update Stocks
ProcessSale

7. Data diagram for 3.0 Generate Reports
Data diagram for 4.0 Manage Data
Output:Reports
inRespondto
QueryForm
(Add,Save
Query)
Output:Process
Shipment
RecordsForm
(Add,Save
Shipments)
Process:Opening
of reportsin
respondtoquery
(All data)
Input:Press
Generate
Reports
Respondto
query
Input:Press
Update Stocks
ProcessReturn
Process:Opening
of Process
ReturnReports
Output:Process
ReturnRecords
Form (Add,Save
Returns)
Process:Opening
of Process
Shipment
Reports
Input:Press
Update Stocks
Process
Shipment
Output:Display
StatusReports
Form (Add,Save
Reports)
Process:Opening
of reportsin
displayingof
statusreports
(All data)
Input:Press
Generate
Reports
DisplayStatus
Reports

8. 3.2 Program Flowchart
3.3 Screen Design(Screen Output)
Output:Manage
data of Modified
RecordsReport.
Process:Opening
of ModifyRecord
Reports.
Input:Press
Manage Data
ModifyRecords
Output:Manage
data of Deleted
RecordsReport.
Process:Opening
of Deleted
RecordReports.
Input:Press
Manage Data
Delete Records
Output:Manage
data of
Additional
RecordReports
Process:Opening
of Additional
RecordsReports.
Input:Press
Manage Data
AddRecords

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