ASME STP-SA-030:2009 pdf download COMPARISON OF FEM STORAGE/RETRIEVAL MACHINE DOCUMENTS TO THE ASME 830.13 SPECIFICATION
FEM 9.221 PERFORMANCE DATA OF SR MACHINES -RELIABILITYIAVAILABILITY[4]
4.1 FEM 9.221 Specification Description
This specification contains a standard method for determining the reliability and availability of SRMachines. It defines basic information relating to testing reliability and availability. The documentalso specifies which test period interruptions are the responsibility of the customer and which are theresponsibilities of the SR Machine supplier, and what downtime should and should not be included inthe reliability and availability calculations. Throughput is briefly mentioned and cycle timedeterminations are referenced to be defined in FEM 9.851. The specification allows a supplier toprovide a throughput rate that increases with time due to customer familiarity with the system andrecovery means related to inexperienced customer personnel. Included are application examplesutilizing the presented calculations for a single aisle system and another with multiple aisles. Formsare included for fault recording during the test period and for evaluation of test data once testinformation is acquired.
4.2FEM9.221 and B30.13 Specification Considerations
The specification outlines a theoretical approach to reliability and availability calculations. Itincludes basic criteria for a single aisle and multiple aisle systems and does not attempt to cover allpotential options utilized in ASRS applications such as aisle changing machines,transfer cars,degraded operation(machines that reach through and pick loads in adjacent aisles)，multipleextractors on one SR Machine that continue to function in degraded mode with the remainingextractor(s), etc. As mentioned in the specification, the customer and the supplier must understandthe basic rules and agree to some application of the presented FEM material during the systemdesign/configuration phase based on the system being considered, the equipment involved, and itseffect on total system availability. B30.13 does not present any information relating to reliability oravailability of SR Machines.
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FEM 9.222 STANDARDS OF THE ACCEPTANCE AND AVAILABILITY OFINSTALLATIONS WITH STORAGE RETRIEVAL MACHINES AND OTHERMACHINERY [5]
5.1 FEM 9.222 Specification Description
The FEM 9.222 document targets availability,reliability and system acceptance data relating to theapplication of a total material handling solution with varied type equipment components.It does notexpressly deal with SR Machines.This specification provides recommendations to determine systemavailability. It presents availability and reliability calculations and defines which should or shouldnot be included for system acceptance. It defines availability and reliability calculations forequipment installed in series and in parallel. Considerations to achieve system designs targeting highavailability are presented.System acceptance testing is discussed including inspections, partial hand-overs.and warranty start. System availability is generally improved over time due to familiarity ofpersonnel with equipment and system recovery, and provisions are mentioned for retest if satisfactoryresults are not achieved. A basic outline of contract activities is presented with assignedresponsibilities. Finally, examples of determining system availability using the included methods arepresented.
5.2FEM9.222 and B30.13 Specification Considerations
The FEM 9.222 document includes helpful information with respect to outlining the responsibilitiesof the customer and supplier as it relates to the acceptance of availability requirements for materialhandling solutions. In practice,when implementing turn-key systems,responsibility for many ofthese items can be confused and tend to become part of the supplier scope.The main benefit of thisspecification may be activities defined during the design and configuration phase as it allows thecustomer the visibility of configuration decisions and how they affect the overall availability of thesystem. Many customers do not actively participate in the system design to this level and, therefore,do not have an intricate understanding of system availability and the impact that configurationdecisions can have. Without this knowledgc，customers can be surprised by how componentdowntime can affect system performance once the system is implemented and equipment is installedand operating. At that point, system changes can be difficult and expensive to implement.
This specification presents basic criteria and is not all encompassing due to the variations of systemdesign and available solutions. System benefits such as degraded mode operation (continuedoperation at reduced levels) is not included. Such variances would need to be discussed betweensupplier and customer and acceptance criteria assigned. The specification also outlines the customeras being responsible for the holding of spare parts.Today’s spare part agreements can counter thisrequirement with spare part consignment programs and on-site supplier owned spare part inventories.The B30.13 does not address or include the information presented in this specification.