Creating an Effective Data Model- SAE 2

Question 1

What are the 2 types of data?

Answer 1

Flow data
Business Data
data models are made of these two types of data.

Question 2

What is Flow Data?

Answer 2

Flow data is the information needed by an application to determine what to perform and who should perform it.
i.e the right data — right task —- right participant — at the right time

Without flow data, the process will not work. It is data that is used to make decisions in a process.***

Question 3

what is Business data?

Answer 3

Business data provides context for a given task for a given participant.
**It is essentially Data entered by a users and it provides the Intent driven UI that users need to see. An intent-driven User Interface is a screen where the user has no issue determining what is being asked of them to do.

Question 4

What is a data model?

Answer 4

A data model is the organization and structure of data and consists of data objects, data object elements, and their associations. data models are defined outside of PRPC and may have already been built by the organization. This is a cross organizational effort.

Question 5

What is a data class?

Answer 5

Think of a data class as a template for how you want the data to should be structured.Data classes use properties to represent the data elements in a data object. We should take advantage of our class structure and create more specialized data classes that  add the new additional properties. 
Once we've created a data class we need to use them in an application. To do this we add a property in a work class. Concept of Instantiate.
Quiz question: A work class uses a PAGE property to use a data class. **

Question 6

Data Model Naming Conventions

Answer 6

• Use a noun for a class name such as Customer or Address.
• Use camel case with the first letter of each word capitalized.
• Make class names simple and descriptive.
• Use whole words. Avoid acronyms and abbreviations unless the abbreviation is standard.

Question 7

Property Naming Convention

Answer 7

Start every property name with a letter and use only alphanumeric characters and dash characters.

Use CamelCase for property names, capitalizing the first letter of each word in the name, such as UseShippingAddress.

Property names are case sensitive; “emailaddress” and “EmailAddress” are two distinct properties.

Use distinct, unique property names Instead of using a property named Amount, use more descriptive names such as LoanAmount

Do not use @ and $ or other special characters and punctuation marks.

Don’t use a property name that matches a reserved page name or keyword, such as Top, Parent, Local, or Primary.

Question 8

What are the 3 participant points of data?

Answer 8

process participant - task level view of the data
process analyst- need for reporting, metrics and analysis.
process designer - Implementation point of view, future development and maintenance.
(all of these were on the quiz)

Question 9

What is the systems of record?

Answer 9

A system of record is the master copy for a given data element or piece of information. Even though it could be replicated in multiple locations.

Question 10

Is a Pega application ever the system of record for anything?

Answer 10

Yes. Pega is the system of record for the transaction of any case that is created.

Question 11

What is a data table?

Answer 11

A data table is a simple structure which is used to store reference data outside of the application.Data tables are used to manage reference data.

Question 12

What is a data page?

Answer 12

A data page loads the data into memory and stores it on the clipboard, it is then accessible to our application.By storing the information in a data page we gain an increase in performance since the data is in cache.
Data pages act as a level of abstraction from the data layer.
We can use data pages as a layer in between the data layer and application layer to make our applications more maintainable and by caching the data in memory we can increase the performance of our application.

Question 13

List the 3 refresh strategies

Answer 13

1) Refresh if Older Than ( defined by when it was last accessed)
2) Do Not Reload When (When rule evaluates to false, the page contents are refreshed)
3) Refresh Once per Interaction

Question 14

what are the three scopes of data pages?

Answer 14

Node, Thread or Requestor

Question 15

what is data propagation?

Answer 15

The mechanism of copying data within the case hierarchy is called “data propagation”.
If data changes in the parent, the subcase will not know until you share it as it does not automatically update.

Question 16

What are the three data modelling goals?

Answer 16

1) Create reusable entities for other applications/case types
2) Create a model that is intuitive to architects and business users.
3) Define the classes and properties for objects and work being presented.

Question 17

Tips for data modelling

Answer 17

• Keep the data structure, data model and the run time structure clear
• focus on class relationships
• Use inherited properties into data structures rather than work level properties.

Question 18

what are the two ways to propagate data to a subcase?

Answer 18

1) map the properties to propagate in the case designer
2) data transform that sets the correct values.

If we need some conditional logic to determine what to propagate, such as we need to loop through a list to see what’s selected, then we should use a data transform.

If the values can be copied without any modifications then we would map the properties.