3.4.1Project Schedule

3.4.1.1Estimated Project Schedule

The following is an estimated schedule for Project 2 - VSE to MVS conversion. The project may begin upon completion of the Inventory Determination task of Project 1, estimated to be on or about June 1, 1996, and will last approximately nine (9) months with a switchover to MVS after approximately eight (8) months.

Table 3. Nine Month Project

 

Month Number

1

2

3

4

5

6

7

8

9

 

 

 

 

 

 

 

 

 

 

 

Month Initial

J

J

A

S

O

N

D

J

F

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase 1

- Specifications

 

**

**

*

 

 

 

 

 

**

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase 2

- Custom Modifications of CORTEX-MS

*

**

**

**

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase 3

- First Trial Conversions: Online and

 

 

*

*

 

 

 

 

 

Batch Appl

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase 4a - MVS Tests & Repetitive

 

 

 

*

**

**

**

 

 

Conversions : Online

 

 

 

 

 

 

 

 

 

 

 

 

*

**

**

**

*

 

Phase 4b - MVS Tests & Repetitive

 

 

 

 

 

 

 

 

 

 

 

 

 

Conversions : Batch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase 5 - Actual Conversion and Switchover

 

 

 

 

 

 

 

*

 

 

 

 

 

 

 

 

 

 

 

 

Phase 6

- Assisted MVS Operations

 

 

 

 

 

 

 

 

**

 

 

 

 

 

 

 

 

 

 

 

3.4.1.2 Estimated Schedule for CNV Responsibilities

The following is an estimated schedule for CNV responsibilities. The actual schedule will be determined at project start.

Table 4. CNV Responsibilities

 

Month Number

1

2

3

4

5

6

7

8

9

 

 

 

 

 

 

 

 

 

 

 

Month Initial

J

J

A

S

O

N

D

J

F

 

 

 

 

 

 

 

 

 

 

 

 

 

01

- Manage CNV Conversion Responsibilities

**

**

**

**

**

**

**

**

**

 

 

 

 

 

 

 

 

 

 

 

02

- Provide Technical Leadership

*

 

*

*

 

 

 

*

*

 

 

 

 

 

 

 

 

 

 

 

03

- Receive and Validate the Conversion

*

*

*

*

*

*

*

*

*

Inventory

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

04

- Develop the Conversion Specifications

 

**

**

**

*

 

 

 

 

**

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

05

- Custom Modify CORTEX-MS and

 

**

**

**

**

 

 

 

 

Proprietary Tools

*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

06

- Perform Manual Conversion Activities

 

*

*

*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

07

- Perform Automated Mass Conversions

*

*

*

*

*

*

*

*

 

 

 

 

 

 

 

 

 

 

 

 

08

- Assist with Setup of MVS Automated

 

 

 

*

 

*

 

*

 

Operations Tools

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

09

- Participate in Online Applications Testing

 

 

 

**

**

**

*

 

 

 

 

 

 

 

 

 

 

 

 

 

10

- Perform Batch Applications Testing

 

 

 

*

**

**

**

*

 

 

 

 

 

 

 

 

 

 

 

 

11

- Participate in Applications Switchover to

 

 

 

 

 

 

*

**

 

MVS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

- Support Initial MVS Operations

 

 

 

 

 

 

 

 

**

 

 

 

 

 

 

 

 

 

 

 

54VSE to OS/390 Migration Workbook

Page 78
Image 78
IBM OS/390 manual Estimated Project Schedule, Estimated Schedule for CNV Responsibilities, Month Number Month Initial

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.