Consigned Kits


SlingShot Assembly is focused on fast, high-quality PCB assembly services at reasonable prices. To accomplish this, we have developed streamlined processes that allow your project to move quickly and efficiently from start to finish.
We understand that sometimes customers need to provide consigned components for orders. It is crucial to understand that far more often than not consigned components slow down orders and introduce unnecessary risks to quality assemblies. To learn more about how this can happen please see our Consigned Kits Myths.
When consigned components are provided for an order, here is SlingShot’s policy for those components.
  • Used Components: We do not accept and will not place used components as these parts have a high likelihood of being damaged. The receipt of used components will result in your order being placed on Hold until new components are provided or purchased.
  • Loose Components: We do not accept loose SMT components (parts not in their original supply form – Tape, Tube, Tray, etc.) as these parts have a higher likelihood of being damaged. We do accept loose through-hole components. The receipt of loose components will result in your order being placed on Hold until components in an appropriate supply form are provided.
  • Overage: We do need and require overage (extra parts) on all BOM lines for every order. All automated assembly processes result in lost or thrown components. The exact requirements vary and can be provided by our sales or customer service representatives. Please contact us for more information. Without overage, your order will be placed on Hold until the appropriate number of components are provided.
  • No or Unclear Component Markings: Consigned parts that arrive with no or unclear identification on the packing will result in your order being placed on Hold until we can determine what parts we have received.
  • Missing Components or Components not on BOM: Consigned kits that are missing components or have components not listed on the provided BOM, we will place the order on Hold until the components and possible alternates can be properly identified and new files provided.
  • Boards without Rails: Consigned boards without rails will result in additional charges on the order. SlingShot uses conveyors to move boards through our production facility. This process requires boards to have rails of at least .25”. Consigned boards without rails must be hand carried throughout the facility.

11 Myths of Consigned Kits

The SlingShot Assembly Team prides itself on flexibility in working with our customers. After working on more than 1,000 projects, we have learned where flexibility can help and where it actually can cause more harm than good. A common topic of discussion revolves around Consigned Component Kits versus Turn-Key Component Kits. Most of our customers have come to trust us with sourcing components for builds. We want to share some perspective on the real risks of Consigned Kits to automated assembly processes like ours. We welcome any questions or comments that you have.
  1. It’s okay and less expensive to send used parts in Consigned Kits
    • Automated assembly equipment uses highly sensitive optical instrumentation to mount parts. Used components can be damaged or slightly altered and will have higher error rates on machines.
    • Components that have been used on one assembly and removed for another assembly are routinely damaged in a way that is undetectable in normal assembly processes.
    • Some components are highly sensitive to moisture. SlingShot has no way of determining when moisture sensitive parts were opened or what environment they were in before they arrived at our facility. This creates added risks for PCB functionality.
    • These concerns as well as others create high levels of risk for the quality of assemblies as well as increased costs and disrupted processes when used components are introduced.
  2. You can include loose parts in Consigned Kits
    • SlingShot’s production processes are geared to reduce the manual handling of components as this introduces unnecessary risk to quality and dramatically slows process times. Our automated part placement equipment relies on components in their original supply form (cut-tape, reels, tubes, trays, etc.). Loose parts can only be processed by hand.
    • Loose surface mount components require extensive manual intervention for nearly all production processes slowing down assemblies and introducing high risk of misplacements, incorrect rotation and damaged components.
    • Through hole/hand solder parts that come in bulk and are not packaged and shipped properly can result in damaged pieces making it either impossible to install or introducing unseen component failure risk.
    • The overarching cost on the customer for sending loose parts is production speed and quality as the job.
  3. Missing parts in Consigned Kits causes no issues

    • Working a seamless, accurate procurement process for an assembly order can be quite complex and require coordination with many distributors. Managing internal stock rooms of components can be even more complex.
    • It is common with consigned kits that one or more BOM lines is missing from the kit, inadvertently forgotten or unfulfilled by a distributor.
    • It is also common for consigned kits to contain alternates that are not listed in the customer BOM.
    • Missing components or consigned components not on a BOM will stop an assembly project and require additional information and clarification from the customer.
  4. I do not need to include packing slips in Consigned Kits
    • Consigned kits with no packing slip means Receiving personnel will need to verify each individual part manually against the production BOM delaying production.
    • The overarching cost on the customer for not having a packing slip is speed and potentially quality as the receiving personnel will have to verify parts and or issues with the parts using in house BOMs.
  5. I can re-use part bags and/or have multiple markings on the bag
    • If the component bag is re-used and/or has multiple markings on the bag, Receiving personnel will take longer to verify the manufacturer part number against the BOM as well as get an accurate count on quantities.
      • Large QTY parts – if bag is not clearly marked, there is possibility of not having enough parts, especially as SlingShot process is to not count parts. If parts have to be counted on consigned kits, this will add labor time.
    • The overarching cost on the customer for re-used part bags/multiple labels is speed, quality, and potentially yield. The multiple markings mean Receiving personnel will have to take extra care to verify each individual part. This increases the risk of a mis-identified component making it on the production floor resulting in quality issues with an assembly project.
  6. I can trust my distributor to not sell counterfeit parts
    • SlingShot uses approved, domestic vendors to ensure we are receiving the correct parts specified in the customer BOM.
    • SlingShot has no way to determine if customer supplied components come from reputable distributors with anti-counterfeit processes.
  7. I can send parts with exact build quanitites, and do not need overage

    • SlingShot employees automated assembly equipment. These robots work at high speeds (placing tens of thousands of parts an hour) with high accuracy rates due to self-checking processes.
    • As a result, the robots “throw” or reject components routinely during assembly. SlingShot has optimized its equipment to balance speed with reduced waste. However, all assemblies require at least some extra components of all BOM lines.
    • Without this overage, projects cannot be completed fully. Re-using “thrown” components introduces risks of using damaged parts, incorrect part placement or incorrect rotation.
  8. I can include multiple Consigned Kits in one box
    • Multiple consigned kits in one box or mixed together in multiple boxes adds substantial time to the Receiving process. The kits must be manually separated through detailed matching of part numbers to multiple customer BOMs. Once the kits are separated, then the normal Receiving process can begin.
    • Similarly, kits with shared components in a single reel, tub, cut tape or other supply form will delay orders. Multiple orders that share a reel, or reels, of components cannot be simultaneously assembled, resulting in consecutive production runs and delayed orders.
    • The overarching cost on the customer for sending multiple jobs in one box is speed. It could take several days, depending on labeling and/or the provided packing slip, to sort and verify the parts and get them to their correct job kit.
  9. My consigned Bare Boards with do not need rails

    • As part of our automated systems, SlingShot uses conveyors to move boards/arrays from one production station to the next. This requires that boards be fabricated with rails (a minimum of .25 inches on at least two opposite sides).
    • If no rails are included on the boards, boards are manually moved from station to station, increasing production time.
    • Additionally, boards with no rails must be manually position in the automated pick and place machines for component placement. This again adds time to the production processes.
    • The overarching cost on the customer is production speed and quality.
  10. I am not accountable for damaged consigned boards

    • SlingShot performs a basic visual inspection of incoming bare boards in Receiving. Bare boards we purchase from our fabrication partners as part of a turn-key order are fully electrically tested and QCed as standard process.
    • Damaged consigned boards will be stop the production process and if the damage is significant enough to prevent quality assembly, the boards will be returned to the customer.
    • SlingShot has no record or way of telling how consigned bare boards are handled prior to their arrival at our shop.
    • When SlingShot buys bare boards as part of a turn-key order, we do take responsibility that the boards are built to the customer file specifications.
    • The overarching cost on the customer for damaged boards is quality, speed, and yield. Not being able to verify where the boards were damaged could cost production time while the issue is solved. In addition, if the damage results in something such as delamination during reflow, a re-spin of the job must be completed and this impacts quality, speed, and yield.
  11. Consigned boards rarely have the wrong surface finish

    • Customer could potentially order or send boards with mismatching/incorrect surface finish. If the order is meant to be leaded but customer sent lead free finish boards, this could make reflow difficult.
    • The overarching cost on the customer for wrong surface finish is speed. If the incorrect finish was purchased, the boards will have to be refabricated with the correct finish.