Overcoming internal resistance in your automotive parts manufacturing firm requires a robust Change Management strategy. As Head of Lean Management, focus on the 'people aspect' of change.

Establish clear communication channels to explain the benefits of lean principles, not just for the company, but for employees' daily work life. Engage with staff at all levels to solicit feedback and involve them in the change process. Also, consider a change agent network to disseminate lean management philosophy and act as role models for their peers.

Lean Manufacturing is at the heart of your role and is critical for driving efficiency improvements in your firm. Begin by mapping out value streams to identify non-value-added activities within your production processes.

Then, implement the 5S methodology (Sort, Set in order, Shine, Standardize, Sustain) to organize the workplace and reduce time wasted searching for tools or parts. Finally, consider adopting Kaizen events to engage employees in short-term projects focused on improving specific areas of the production process.

Total Productive Maintenance (TPM) should be a key component of your lean management initiatives. It focuses on proactive and preventive maintenance to maximize the operational efficiency of equipment.

Introduce TPM by training employees to perform basic maintenance, thereby preventing breakdowns and reducing downtime. Also, establish a cross-functional TPM team to monitor equipment performance and optimize maintenance schedules.

To achieve Operational Excellence, concentrate on streamlining processes to enhance quality, cost, and delivery. Employ Six Sigma methodologies to reduce process variation and improve quality.

Additionally, implement Just-In-Time (JIT) Inventory Management to reduce waste and free up capital. Ensure that you have real-time data to make informed decisions, and foster a culture where Continuous Improvement is the norm.

It is crucial to actively engage your workforce in the lean transformation. Develop programs that recognize and reward employees for lean-related improvements and suggestions.

Training programs should not only focus on lean tools and methodologies but also on developing a lean mindset. This encourages ownership of the lean process amongst your team, leading to more sustainable improvements.

Building a resilient Supply Chain is vital for an automotive parts manufacturer to cope with industry demands and Disruptions. Reevaluate your supplier base to diversify risk and develop contingency plans.

Implement tools for better supply chain visibility and responsiveness. By developing a resilient supply chain, you can ensure a steady flow of materials, which is essential for maintaining lean operations.

Continuous Improvement is a cornerstone of lean management. Foster an environment where employees are encouraged to identify inefficiencies and are given the autonomy to implement small-scale improvements.

This can lead to significant cumulative efficiency gains over time. Additionally, incorporate regular process reviews to ensure that lean initiatives remain effective and aligned with the company's strategic objectives.

Effective Stakeholder Management ensures that all parties with an interest in your lean initiatives are accounted for and their expectations managed. Identify key internal and external stakeholders, understand their interests and influence, and develop a strategy to communicate and engage with them effectively.

This will smooth the implementation of lean management practices and help secure the necessary buy-in.

Integrate Visual Workplace strategies to create work environments that are self-explaining, self-regulating, and self-improving. Use visual cues like color coding, floor markings, and Kanban Boards to clearly communicate information at the point of use.

This not only helps in reducing waste and mistakes but also enhances safety and employee understanding of lean principles.

Kaizen, or continuous improvement, is a participative approach where employees at all levels work collaboratively to achieve regular, incremental improvements to the manufacturing process. Introduce regular Kaizen events where cross-functional teams can focus on specific areas for improvement.

This will lead to increased efficiency and a stronger culture of continuous improvement within your organization.