1. Data Dictionary : Store & Flow
And Franchise Colleges
09 THE DATA DICTIONARY
: Stores & Flows
By MANSHA NAWAZ
Section 09
Data Dictionary : Store & Flow

2. Data Dictionary : Store & Flow
Learning Aims
Aim
to be able to construct a partial data dictionary
Objectives
to model the composition of data stores
to record all appropriate data store detail
to model the composition of data flows
to record all appropriate data flow detail
Section 09
Data Dictionary : Store & Flow

3. Data Dictionary : Store & Flow
Lecture Outline
the nature & purpose of the data dictionary
data elements & data structures
data stores
data flows
automated data dictionaries
Section 09
Data Dictionary : Store & Flow

4. Document : Design Specification
Data Dictionary
Data Stores and Flow lecture 08
Structures & Elements
Data Stores and Flow
Usage lecture 09
Process Descriptions
Mini Specs and Sample Screen Shots lecture 10
NORMALISATION lecture 11
Database Tables derived from Data Store Descriptions
Section 09
Data Dictionary : Store & Flow

5. Data Dictionary : Store & Flow
Data Stores
Record the usage of each data store as follows.
Ascent generates these automatically, however the reporting of this material is inadequate
Consider typing in MS Word and place material in the Appendix.
Useful when making future changes to the data store. 1
Data Store name
Description
Composition
Inputs
Outputs
vol of read/write
Present status x
1 things 2
add
create
supplier
purchase
note 2 y
Section 09
Data Dictionary : Store & Flow

6. Data Store – Usage Example.
Data Store name
1 things
Description
The things stored...
Composition
= {THING}
Inputs
x from process 1
Outputs
y to process 2
vol of read/write
Read 1* per week
Present status
paper ledger
Section 09
Data Dictionary : Store & Flow

7. Data Dictionary : Store & Flow
Data Flows
Record the usage of each data flow as follows.
Ascent generates these automatically, however the reporting of this material is inadequate
Consider typing in MS Word and place material in the Appendix.
Useful when making future changes to the data flows.
Data Flow name
Description
Composition
Source
Destination
vol of read/write
Present status 1 x 2
Section 09
Data Dictionary : Store & Flow

8. Data Flow – Usage Example.
Data Flow name X
Description
..the bla bla bla
Composition
1{THING}10
Source
data store 1
Destination
process 2
vol of read/write
once per day
Present status
read from thing ledger
Section 09
Data Dictionary : Store & Flow

9. Data Dictionary : Store & Flow
Automated DDs
speed of production and edit
document quality
checking
code generation þ
cost
culture change
learning requirement
no set standards ý
Section 09
Data Dictionary : Store & Flow

10. Document : Design Specification
Data Dictionary lecture 08
Data Stores - Structures & Elements lecture 08
Data Flow - Structures & Elements lecture 08
Data Stores and Flow Usage lecture 09
Process Descriptions lecture 10
NORMALISATION lecture 11
Database Tables derived from Data Store Descriptions
Section 09
Data Dictionary : Store & Flow

11. Document : Data Dictionary
Data Dictionary lecture 08
Data Stores - Structures & Elements lecture 08
Data Flow - Structures & Elements lecture 08
Data Stores and Flow Usage lecture 09
Utilise templates
Fill in the details
Consider placing as a sub-section within the previous section on Structures and Elements
Process Descriptions lecture 10
Process Usage & Mini Spec
Process Screen Shot
Section 09
Data Dictionary : Store & Flow

12. Data Dictionary : Store & Flow
Summary & Self Study
Summary
record elem/struct
stores & flows
use elem/struct
automation
adv
disadv
Self Study
review the lecture
complete A9 (a) from the course workbook
can you achieve the objectives set out in slide 2?
Section 09
Data Dictionary : Store & Flow