What is "Total Productive Maintenance" $($TPM$),$ and what is a common practice within TPM to enhance equipment reliability?

a$)$ TPM is a strategy focused on reducing financial costs of maintenance. A common practice is financial audits of maintenance expenses.

b$)$ TPM is a maintenance strategy aimed at improving equipment effectiveness. A common practice within TPM is autonomous maintenance, where operators are trained to perform routine maintenance tasks.

c$)$ TPM focuses on inventory management practices. A common practice is optimizing inventory levels to ensure availability of maintenance parts.

d$)$ TPM is used for supplier performance management. A common practice is evaluating supplier reliability and quality.