1.  Complementary information: Raman spectroscopy and EDS provide complementary information about a sample. While EDS can provide information about the elemental composition of a sample, Raman spectroscopy can provide information about the chemical bonding and crystal structure. Together, these two techniques can provide a more complete understanding of the sample being analyzed.

2.  High spatial resolution: By combining a Raman system with an SEM, you can obtain high spatial resolution data, allowing you to identify chemical variations at the sub-micron level. This can be particularly useful in materials science, biology, and other fields where a detailed understanding of the chemical composition of a sample is important.

3.  In-situ analysis: With an in-situ Raman system, you can perform analyses under various conditions, such as high temperatures or pressures, that would otherwise be difficult to study using traditional laboratory techniques.

4.  Increased sample versatility: Raman spectroscopy can be used to analyze a wide range of samples, including powders, liquids, and gases. This versatility can allow you to expand the range of samples you can analyze and increase the potential applications of your SEM system.

5.  Better characterization of some materials: Raman spectroscopy is a powerful technique to analyze and identify certain types of samples, such as polymers, biomaterials, and some minerals which are difficult to be fully characterized by EDS alone.

Overall, adding a Raman system to your SEM with EDS can provide a more complete understanding of your samples and increase the range of applications for your laboratory.