## 2.3.3.1.2.1 System Development Assurance 

The DAL is validated in the CSA, which may differ among investment alternatives. The DALs for the alternatives are then included in the IAP and ISPD prior to the IID. 

## 2.3.3.1.3 Initial Business Case 

In the Initial IA phase, the Initial Business Case considers at least three alternative approaches for achieving the desired capability. In each case, the alternatives are evaluated against the legacy case or status quo in terms of lifecycle  cost, operational benefits, safety, and risk. 

## 2.3.3.1.4 Initial ISPD 

The IID requires an initial ISPD. The ISPD provides the investment decision authority a summary of the plans for the SI phase of the proposed investment. It conveys the most critical, relevant, and meaningful information to support JRC decision making. 

In the ISPD, the PO must clearly explain the scope of the safety effort and describe a high-confidence program implementation plan. Within the ATO, the ISPD is approved by both the Vice President of the organization executing the program and the ATO Chief Operating Officer. Certain sections of the ISPD are reviewed and approved by specific executives, including the Vice President of AJI. 

## 2.3.3.1.5 Preliminary TEMP 

The TEMP is the primary test management document for an acquisition program throughout its lifecycle. It delineates all activities that must be performed to achieve the goals of Verification and Validation (V&V). It also documents the Test and Evaluation (T&E) methodologies that will be used to assess safety hazard controls and security risks. The preliminary TEMP describes the investment program test strategy and scope. It is developed based upon the concepts and functions documented in the pPRD prior to the IID and is not expected to contain the complete level of detail required to fully implement the T&E program. 

## 2.3.3.1.6 PMP 

The PMP defines how the service organization manages the investment program to execute the strategy recorded in the ISPD. It defines the relationships and responsibilities of key organizations that contribute to the implementation and fielding of this initiative. All investment programs that have a safety impact on the NAS are required to execute a system safety management program as specified in the PMP. 

## 2.3.4 Achieving an FID 

The FID is the point at which the JRC approves the investment program, sometimes with Record of Decision changes and special direction. System safety has a twofold purpose leading up to the FID: 

• To develop early safety requirements that form the foundation of the safety and systems engineering efforts, and 

• To provide objective safety data to aid acquisition management in making decisions. 

This early assessment allows for informed, data-driven decisions. 

To support the FID, a PHA is completed to inform the PO and JRC of the risk ratings for the program. The required work products of the Final IA phase must be verified and validated (according to the AMS V&V guidance) prior to the FID. If the JRC accepts the recommendations, it approves the investment program for implementation; delegates 

