In the intricate world of database management, navigating the multitude of available resources can be a daunting task. The choice of a database management system (DBMS) can be a delicate endeavor that often entails a profound understanding of the specificities of varying systems. One such system that has been gaining immense popularity due to its inherent flexibility and adaptability is MongoDB. However, selecting the right MongoDB consultant for your business can be a real challenge, given the myriad intricacies involved in the process.

Let's first unravel this term - MongoDB. This is a type of NoSQL DBMS that uses a flexible, JSON-like schema, rather than the traditional table-based relational database structure. It is a highly applicable system for various types of applications, offering high performance, high availability, and easy scalability. The unique design of MongoDB allows it to handle large amounts of data and complex transactions with high processing speed. It has found a significant space in the technological ecosystem, hence the emergence of MongoDB consultants.

These MongoDB consultants are experts who offer guidance and expertise to businesses looking to either transition to or optimize their use of MongoDB. But how does one go about identifying the right consultant for their specific needs?

The answer to this conundrum lies in the application of certain evaluative criteria that will enable the selection of a consultant that aligns with your business's unique needs and objectives. These metrics, though not exhaustive, include experience, skill set, industry knowledge, communication skills, and ethical concerns.

Experience, as they say, is the best teacher. A MongoDB consultant with extensive experience ensures an understanding of the DBMS's intricacies, its possibilities, and its limitations. This understanding is crucial for the seamless integration of MongoDB into your business operations. The consultant should also have a proven track record of effectively implementing MongoDB for clients with similar use cases to your own.

A well-rounded skill set is also a crucial factor to consider. Beyond knowledge in MongoDB, the consultant should be proficient in related technologies such as JavaScript, Python, and NodeJS. These skills supplement the implementation process, ensuring a more comprehensive and robust solution.

Industry knowledge is another key determinant of the right MongoDB consultant. They should understand the unique needs and challenges of your specific industry. This not only ensures a more personalized approach to your MongoDB implementation but also ensures the consultant is well-versed in the industry regulations and compliance requirements.

Effective communication is a critical but often overlooked skill. The right MongoDB consultant will be able to effectively communicate complex ideas and concepts in a way that is easy to understand and follow. This ensures that stakeholders are kept in the loop throughout the implementation process, and potential issues can be identified and addressed promptly.

Ethical considerations are also vital. The consultant should demonstrate a strong commitment to ethical standards, including confidentiality and integrity. This safeguards your business's sensitive data, ensuring peace of mind throughout the MongoDB implementation process.

Through the lens of microeconomic theory, hiring a MongoDB consultant can be viewed as an investment. The potential return on this investment—improved operational efficiency, increased productivity, and enhanced business agility—can significantly outweigh the initial costs. Therefore, the process of selecting the right MongoDB consultant should be approached with the utmost care and consideration, using a robust set of selection criteria as a compass.

In conclusion, hiring the right MongoDB consultant is a complex process requiring a deep understanding of MongoDB's technicalities, astute application of evaluative criteria, and a keen awareness of the potential return on investment. With the right consultant by your side, MongoDB has the potential to revolutionize your business's data management strategy.