Define what you want to compare
List the concentration requirement, composition questions and formulation constraints. Identify which grades or versions should enter the evaluation and why.
Agree the evaluation evidence
Confirm the specification and available supporting documents before interpreting a trial. Ask which analytical basis and batch records apply to the material under evaluation.
Turn evaluation into a procurement brief
Record the requirements that remain unresolved, the intended market and the documents needed before purchase. Sampling, packaging and timing require an agreed commercial response.