"Wikipedia: "In quantum mechanics, the measurement problem is the problem of how, or whether, wave function collapse occurs."
There is no existing state prior to measurement. There is no relation with the measurement apparatus that can give a singular 'measured this way' outcome. This had been widely i interpreted as meaning it is not something actual, rather than lacks a relative to specific observer viewpoint or measurement process. In place of what there is, until we have a singular description, is consideration of the liklihood of finding different outcomes when measurement takes place . These outcomes do not yet exist as they can only be formed when the measured object and measuring apparatus relation happens.so pre measurement there is contemplation of one future outcome that will be actualized and other outcomes that are just imaginary; unless using the Many worlds theory. This is therefore not something real.