On the Order Promising TAB of your P4210 SO version check the settings:
I choose 1 = Auto Promising Mode
Create a new SO using P42101 (check before which version of P4210 it’s called) and
press Edit Full Header buton:
And here it is the TAB that I saw in your FDA print screen:
Understanding Order Promises
You activate order promising by completing the processing option on the Order Promise tab for
the Sales Order Entry (P4210) program.
You use the order promising feature to track supply and demand history and to calculate either an
available-to-promise (ATP) or capable-to-promise (CTP) delivery date when you enter a sales
order. When determining the promise date for an order, the system performs an ATP or CTP
calculation and enters the result into the Scheduled Pick Date field on the Display Before Accept
form. The system also calculates the delivery leadtime, and adds the result to the Scheduled Pick
Date, the Promised Ship Date, and the Promised Delivery fields. The promised delivery date is
the date when the customer will receive their order.
Order promising calculates on an item-by-item basis for each detail line in the sales order. Any
time the order changes the system updates tables immediately so that subsequent orders reflect
actual supply and demand.
When entering sales orders that require an ATP or CTP date, remember that the steps to enter
order header and order detail information are the same. Order promising is a feature in the Sales
Order Management system and can be used with these processes and options:

Partial orders

Backorders

Partial shipments

Substitutes

Multisourcing
Generating Delivery Proposals with Order Promising
Order Promising can generate several delivery proposals to meet a customer's requested date of
delivery for an order. After you have entered header and detail information, you initiate Order
Promising. Then you select the auto promise mode. The system uses XAPI (external application
program interface) functions to initiate, update, and send the request to promise.
While the system is sending this information, you will be unable to modify the open sales order.
When you select the auto promise mode to promise a delivery date, the system generates
several proposals, automatically selects the one with the earliest delivery date, and then supplies
that date.
Customizing Order Promising Proposals
You can customize the options that Order Promising considers as it creates delivery date
proposals. Proposals can be very restrictive or very flexible, depending upon how you have
entered the customer's information and the sales order information.
Order Promising uses default information from existing system setup whenever possible.
This table outlines the codes, fields, and values that Order Promising uses for proposal data:
Code, Field, or
Value
Indications
Business Objective
Which set of inclusion rules does the system use to promise the order?
Order Promising uses the default information from the customer's billing instructions to
associate a business objective to the customer.
Partial Order
Can line items be shipped on different dates?
Code, Field, or
Value
Indications
Shipments Allowed
Order Promising uses the default information from the Billing Instructions in the Customer
Master.
Backorders Allowed
Can line items be shipped later than the requested date?
Order Promising uses the values from the Customer Billing Instructions and Branch/Plant
Constants. Backorders Allowed must be enabled on both forms in order for backorders to be
allowed.
Partial Line
Shipment Allowed
Can line item shipments be split?
Order Promising uses the default information from the Billing Instructions in the Customer
Master.
Substitutes Allowed
Will the customer accept substitute items?
Order Promising uses the default information from the Billing Instructions in the Customer
Master.
Multi-Sourcing
Allowed
Can items be shipped to a customer from different branch/plants?
The system determines a customer's preference for single source branch/plant delivery
through the setup of Order Promising. Otherwise, multisourcing is allowed.
Shipping Group
Is the item to be shipped as part of a group that must ship together on the same date?
If the customer requests a shipping group, you can indicate that preference in the Order
Promising Scenario Manager.
Planning Unit of
Measure
What is the smallest possible planning unit of measure that can be shipped as part of an
order?
The system uses the unit of measure entered in the sales order. Order Promising never
suggests a delivery proposal with a fraction of the unit of measure indicated on the sales
order.
If you are using Order Promising to calculate ATP or CTP delivery dates, from the Form menu,
select Order Promising and then select Auto Promise.
The system generates delivery proposals to meet the customer's requested delivery date.
See Also
Integrating PeopleSoft EnterpriseOne 8.11 with Supply Chain Planning PeopleBook
Forms Used to Select Promised Delivery Dates
Form Name
FormID
Navigation
Usage
Work With Sales
Order Headers
W4210H
Sales Order Processing (G4211), Enter Orders
Header
Review and select sales order
header records.
Sales Order
Header
W4210G
Click Add on Work With Sales Order Headers.
Add and revise sales order
header information.
Sales Order Detail
Revisions
W4210A
Click OK on Sales Order Header.
Add and revise item information
in the detail portion of the form.
Form Name
FormID
Order Acceptance
W42232A
Navigation
Select Order Promising from the Form menu,
and then select Auto Promise on Sales Order
Detail Revisions.
Usage
Click the appropriate button to
place the order or to revise the
order.
Selecting the Promised Delivery Dates
Access the Order Acceptance form.
Review, and if necessary, revise the promised delivery dates. Then click OK to place the order.