Provide an overview of the trade being evaluated, including its objectives, scope, and motivation. Describe the context in which the tradeoffs are being considered and the decision-making process involved (i.e. will the decision be made through an autocratic or democratic process).
Choosing radiation hardened memory that can withstand the Total Ionizing dose and Single Event Effects that are experienced at low earth orbit to ensure no corruption occurs for the OBC using SPI. Main considerations are the type of memory, space required, radiation hardness and cost. Two major companies that seem to have an extensive portfolio of rad hard and rad tolerant memory are Infineon, Microchip and Renesas (what a stupid name).
Any type of memory that meets these requirements can be used however certain types may be more expensive than others
Minimum Resistance against Single Event Upsets
Total Ionizing Dose
Error correction code
Based on low earth orbit and short lifespan of the satellite, probably radiation tolerant will be enough. Possibly software could be used to circumvent any short comings in error correction. I am not sure.
Identify the criteria that will be used to compare the different options against each other and how they will be weighed (e.g. using a scoring system or ranking). These may be qualitative or quantitative. Lower level trades should prioritize quantitative criteria over qualitative. Criteria might include factors such as cost, performance, mass, schedule, risk, and other relevant considerations.
listed from most important to least