There is no guarantee that any particular asset allocation or mix of funds will meet your investment objectives or provide you with a given level of income. (investor.vanguard.com)
A particular asset allocation may be achieved by using different allocations in different accounts or by using the same one across multiple accounts. (fidelity.com)
IB Asset Management does not guarantee that any particular asset allocation portfolio will meet a given client's investment objective or provide a client with a specified level of income. (ibkram.com)