Introduction

Systems Engineering provides a structured way to think about complex problems and the systems created to solve them. It helps organizations move from stakeholder needs and mission objectives to a verified, validated, and useful system solution.

The central concern of Systems Engineering is not only whether individual components work, but whether the whole system works as intended in its operational environment.

Purpose of Systems Engineering

Systems Engineering exists to improve the likelihood that a system will satisfy stakeholder needs across its life cycle. It does this by combining technical, management, and human-centered activities into an integrated approach.

Systems Engineering helps answer questions such as:

• What problem are we trying to solve?
• Who are the stakeholders?
• What outcomes must the system enable?
• What are the system boundaries?
• What external systems does it interact with?
• What constraints limit the solution space?
• What risks could prevent success?
• How will we know the system is acceptable?
• How will the system be operated, maintained, upgraded, and retired?

Systems Thinking

Systems Engineering is grounded in systems thinking. Systems thinking encourages engineers and decision-makers to look beyond individual parts and consider:

• Interactions between elements
• Interfaces and dependencies
• Feedback loops
• Emergent behavior
• Life-cycle consequences
• Operational environment
• Human and organizational factors
• Value delivery over time

A technically excellent component can still contribute to a failed system if it is poorly integrated, difficult to operate, unsupported, unsafe, insecure, or misaligned with stakeholder needs.

System of Interest

A key concept in Systems Engineering is the system of interest. The system of interest is the system being considered, developed, analyzed, operated, or improved.

The system of interest may be:

• A product
• A platform
• A service
• A software-intensive system
• An enterprise capability
• A mission system
• A transportation network
• A medical device
• A manufacturing process
• A defense system
• A cyber-physical system

The system of interest is defined by context. A subsystem in one analysis may be the system of interest in another.

The Need for an Integrated Approach

Complex systems involve many disciplines. Mechanical, electrical, software, safety, cybersecurity, human factors, operations, logistics, manufacturing, quality, and business teams may all affect system success.

Systems Engineering provides the integration discipline that connects these perspectives.

It does not replace specialist engineering disciplines. Instead, it coordinates and aligns them so the total system achieves its intended purpose.

Relationship to Other Documentation

This introduction connects to the following topics: