Answer
A cikin bazara na Crest-to-Crest, ba duk raƙuman ruwa ba ne zasu iya aiki idan ƙarshen ya zama murabba'i kuma yana haskakawa. Raƙuman ruwa masu aiki sune waɗanda ke ba da gudummawa ga karkatarwa; raƙuman ruwa marasa aiki sune waɗanda ke hulɗa da faranti na lodi ko kuma kusa da shims. Matsakaicin lokacin bazara $k$ ya yi daidai da adadin jujjuyawar aiki $N$. Idan ƙarshen ya kasance 'lebur' (shim ƙare), adadin juyawa mai aiki shine $ N - 1$. Rashin bambancewa tsakanin jumillar juye-juye da jujjuyawar aiki yana haifar da ƙimar yanayin bazara wanda yayi ƙasa da ainihin ƙimar da aka auna, yawanci ta $10$-$15\%$. A cikin madaidaicin na'urori masu auna sararin samaniya, wannan rashin daidaituwa na iya haifar da gazawar daidaitawa. Madaidaicin takaddun ƙira dole ne su ƙididdige adadin raƙuman ruwa a kowane juyi $n$ da ainihin ƙidayar jujjuyawar aiki don tabbatar da daidaiton ƙimar.
