[en] The first document in the System Safety Development Center (SSDC) series deals with the subject of Occupancy-Use Readiness. The material included in that manual provided the basis for development of the SSDC workshop in Operational Readiness. The original Occupancy Readiness Manual, however, deals only generally with the subject of process safety; i.e., the safety of overall ''processes'' such as solar collection systems, nuclear reactors, and coal fired electrical plants. The manual also fails to detail the considerations involved in maintaining the state of readiness on a continuing basis. Both of the latter subjects are dealt with in some detail in the SSDC's Operational Readiness Workshop. The purpose of this document is to provide additional documentary material dealing with subjects introduced in SSDC-1 Occupancy-Use Readiness Manual, and SSDC-12, Safety Considerations in Evaluation of Maintenance Programs. In augmenting SSDC-1, Part I of this manual provides additional material related to process safety; in the case of SSDC-12, the subject of safety considerations in evaluation of maintenance programs is broadened in Part II to include maintenance of personnel systems and procedural systems as well as hardware. ''Maintenance'' is related more directly to the concept of operational readiness and an alternative analytical tree is provided for hardware maintenance program evaluation