1. Origin and Development
? CMMI, formerly known as Software Capability Maturity Model (SW-CMM), was born in 1987 and focuses on addressing quality and schedule control issues in the software development process.
? In 2002, SEI integrated multiple domain models (such as systems engineering, procurement, etc.) and launched CMMI 1.0, marking its transformation from a single domain to multidisciplinary integration.
? The CMMI 2.0 version released in 2018 further strengthens agile practices, data-driven decision-making, and performance management, becoming the current mainstream standard.
? On April 6, 2023, ISACA released CMMI 3.0, which aims to provide a more flexible and customizable capability assessment framework to meet the ever-changing organizational management needs and achieve comprehensive maturity improvement.

2. Core objectives
CMMI uses a structured methodology to assist enterprises in:
? Identify the shortcomings of the current process;
Establish a repeatable and predictable work mode;
? Achieve continuous improvement and cultural transformation.

1. Maturity level
CMMI adopts two representation methods: staged and continuous. The staged model is divided into five maturity levels, which progress step by step:

2. Process Areas
Each level contains multiple process areas, totaling 22 core domains, divided into four categories:
Process management: Organizational process definition, training, and improvement (such as OPF, OPD).
Project management: Integrated project management, risk management (such as IPM, RSKM).
Engineering: Requirements development, validation, and confirmation (such as RD, VER, VAL).
Support: configuration management, quality assurance (such as CM, PPQA).

1. Value to the enterprise
Enhance management capabilities: Reduce human errors and improve project success rates through standardized processes.
Enhancing market competitiveness: High level certification (such as CMMI Level 3) is the "passport" for international bidding.
Cost optimization: Quantitative management reduces resource waste. According to case studies, defect repair costs can be reduced by over 30%.

2. Promoting the industry
Unified benchmark: Reduce inefficient competition and promote industry chain collaboration (such as supplier management and integrated development).
Technological innovation: promoting the application of technologies such as AIOps and digital twins, accelerating digital transformation

（I.） General application materials
1. Enterprise qualification certificate:
Business license, legal person identity certificate, tax registration certificate, etc.
2. Project documentation:
Completed project requirements documents, design documents, test reports, acceptance certificates, etc.
3. System documents:
Organizational level process manual, role responsibility matrix, training records, etc.
4. Data and tool proof:
Quantitative management data (required for level 4 and above), tool usage records (such as Git commit logs, Minitab analysis reports).
5. Evaluate supporting materials:
Self evaluation report, improvement plan, past evaluation results (if applicable).

（II.） Classification application materials
CMMI Level 3:
Process definition documents (such as "Requirements Management Specification" and "Project Planning Guide").
Pilot project operation records and optimization feedback.
CMMI Level 4:
Organizational Process Performance Model (OPP) and Quantitative Objective Analysis Report.
CMMI Level 5:
Continuous improvement cases (such as root cause analysis of defects, technological innovation solutions).
Comparison data on the implementation effect of optimization measures.

precautions
Time cycle:
Level 3 certification takes 3-4 months, while levels 4 and 5 require 6-8 months.
Cost composition:
Including registration fees, consulting fees, and evaluation fees (approximately tens of thousands to millions of RMB, depending on the level and institution) 37.
Certificate issuance:
Unified by CMMI Institute in the United States, but the style may vary slightly due to different assessors