A few lot-by-lot acceptance sampling procedures for
attributes are proposed as alternatives to the usual
double sampling. In these schemes whenever a second
sa~~iple is needed, the snn~ple inforrnatioa from neighbouring lots is used. The new plans have the UC iticntical to that of the comparable double sampling plan. The primary advantage of these plans is a reduction in cost due to a smaller ASN. An empirical study which investigates the effect of sudden shifts in quality level on the probability of acceptance and ARL under the proposed plans is included
