You will be notified by the USCIS if your I-130 petition is approved or denied. If it is approved, your brother or sister will be notified by the Department of State when a visa number is available. If your sibling is outside the country, he or she must then go to the local U.S. consulate to complete visa processing. If your sibling is legally inside the U.S. when a visa number becomes available and has not worked without authorization, he or she may apply to adjust to Permanent Resident status.
If the visa petition you filed for your brother or sister is denied, the denial letter will tell you how to appeal and when you must file the appeal. After your appeal form and a required fee are processed, the appeal will be referred to the Board of Immigration Appeals in Washington, D.C.