1 / 34

Multi-Period Phased Sparing & LCC

IMP Aerospace. Multi-Period Phased Sparing & LCC. By: Parker MacDonald Logistics Support Analyst. November 2013. IMP Aerospace, P.O. Box 970, Enfield, Nova Scotia, Canada B2T 1L5 Tel. 902. 873.2250 • Fax 902 873 2290 • e-mail. impaero@impgroup.com Website. www.impgroup.com.

nerys
Download Presentation

Multi-Period Phased Sparing & LCC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IMP Aerospace Multi-Period Phased Sparing & LCC By: Parker MacDonaldLogistics Support Analyst November 2013 IMP Aerospace, P.O. Box 970, Enfield, Nova Scotia, Canada B2T 1L5 Tel. 902. 873.2250 • Fax 902 873 2290 • e-mail. impaero@impgroup.com Website. www.impgroup.com

  2. IMP: Who We Are • Who We Are • 100% Privately Held Canadian Company founded in 1967 • Headquartered in Halifax, Nova Scotia • Over 4,500 Employees (> 2,500 in Nova Scotia) • Operations Across Canada • Dedicated Support to the Crown/PWGSC for over 30 Years • Provide support to 6 RCAF aircraft fleets, including Optimized Weapons Systems Support to the Cormorant, C130 and CP140 • Comprehensive avionics, component and structural manufacturing capabilities • Extensive Engineering, ILS and Publications Capabilities • Ready to provide support immediately • Top 100 Best Companies to work for in Canada 2

  3. Multi-Period (Phased) Sparing • Schedule Change • Can change depending on numerous factors • May be planned to fluctuate from day 1 • Change of Fleet Size • Change in Operating Hours • Analyzer not currently set up to accommodate life cycles with differing parameters during different periods.

  4. Aircraft Schedule • 2007 plan: • 18 AC until 2015 • 2009 plan: • 18 AC until 2015, 11 AC until 2025 • 2011 plan: • 18 AC until 2020, 14 AC until 2030 • Current plan = 18 AC total until 31 Dec 2015 and 14 AC between 1 Jan 2016 – 31 Dec 2030

  5. Aircraft Schedule Changes

  6. Flying / Operating Hours • Generally the Fleet Flying hours (FHrs) per year = 6,500hrs • As the fleet size goes down, the AC must work longer, harder hours • FHrs = Operating hours

  7. Spares Required after Reduction • DND has just informed us that the schedule for our AC has changed • 20 AC, 6,500 Fhrs per year reduced to: • 10 AC, 6,500 Fhrs per year • Spares Required?

  8. Spares Availability after Reduction

  9. Or they end up here

  10. Multi-Period (Phased) Sparing • To gauge the number of spares required when you have differing parameters in multiple time periods you must create separate models for each period. • Combine the results from each sparing analysis to get a final count. Period A spares + Period B spares =Total spares Required • Sounds Simple?

  11. Discards and PLT • This is run with a Procurement Lead Time (PLT) of 6 months • The Period is 3 years Analyzer says we need 7 spares. What is wrong with that statement?

  12. Discards and PLT • Same 3 year model, but PLT of 37 months • PLT of 37 months means new stock can’t be acquired • Discarded units are included in New Stock required 3.42 Discards per year X 3 years = 10.26 units Add to the 3 units required = 13.26 units

  13. Discards and PLT • Most LRU’s and SRU’s will never have a discard rate of 3.42 per year • But a discard rate of 0.2 per year, over 20 years = 4 units • If that item is $100,000 each, that is a big deal • Very useful for consumables

  14. Discards vs No Discards • AC Main Landing Gear Tires • Wear Out at 200 FHrs • Each AC flies 360 FHrs per year • With PLT set to 6 months (no discards included) = 30 tires until Dec 31, 2030. • With PLT set to max (discards accounted for)= 772 Tires required • At a cost of $1,000 each, you want to make sure you account for your discards.

  15. Baseline Configuration • No UDS Spares • 20 AC • Retirement Date Dec 31, 2030 (17 years) • 9,600 Operating Hrs per Year = 40 Op Hrs/AC/Month • 10 AC at East and West Coast Bases • 3 LOM (1st, 2nd, Contractor) • 98% Operational Availability

  16. Baseline Spares Provisioning • 17 year period (2030)

  17. This column shows how much should be on hand at all times for X% Operational Availability Stock on Hand

  18. Discards • How many spares required to make Retirement date of 2030? • Original = 14 units = $38,700 • Actual = 14 units + 49 discarded units = $228,200

  19. 205 month (17 year +1 month) PLT

  20. Baseline Schedule • Baseline Schedule has 20 AC, 9,600 FHrs per year • 10 West Coast, 10 East coast • 9,600 Operating Hrs per Year = 40 Op Hrs / AC / month • Retirement date of Dec 31, 2030

  21. New Schedule • Dec 31, 2020: Fleet reduced to 10 AC • Flying rate will remain 9,600 FHrs per year (fleet rate). • More or less spares Required?

  22. Period A 20 AC Jan 2014 – Dec 2020 9,600 FHrs per year 40 FHrs per month / AC Begin with 0 stock Period B 10 AC Jan 2021 – Dec 2030 9,600 FHrs per year 80 FHrs per month / AC Begin with SOH at end of Dec 2020 Two Models

  23. Period A: Jan 2014 – Dec 2020 • We can see that the number of units required on hand at all times is the same as Period A, with no discards. LRU 2 – 12 Discards SRU 1B – 7 Discards SRU 2A – 2 Discards

  24. Transition from A to B • We must take the number of spares remaining (after discards) at the end of Period A (Dec 31, 2020) and put them in the stock on hand at the beginning of the Period B model (Jan 1, 2021).

  25. Period A 20 AC Jan 2014 – Dec 2020 9,600 FHrs per year 40 FHrs per month / PE Begin with 0 stock Period B 10 AC Jan 2021 – Dec 2030 9,600 FHrs per year 80 FHrs per month / PE Begin with SOH at end of Dec 2020 Period A vs B Constants

  26. Period B: Jan 2021 – Dec 2030 • Additional spares for all but SRU 1A because AC now working harder LRU 2 - 17 Discards SRU 1B - 10 Discards SRU 2A - 3 Discards

  27. Period A + Period B Sparing To get UDS for Period B : (A New – A Discards) = B UDS To Calculate Total number of Spares Required: A New + B New = Total Spares Required

  28. OoPS fORgoT • This slide shows the outcome of not adjusting the FHrs / AC / Month. • Uses 40FHrs instead of 80FHrs • Make sure everything is updated correctly or you miss out on 19 spares and $74,000

  29. Period B1: 14 AC 20 Fhrs • This slide shows the outcome of a different Period B. • Uses 20FHrs instead of 80FHrs • Uses 14 AC instead of 10 AC

  30. Life Cycle Cost (LCC) Adjust any LCC costs by the applicable inflation rate. Change the Replacement cost of the TOP LEVEL PE to $0 to avoid Acquisition costs in period 2

  31. LCC Cost Period A: $247,222 LCC Cost Period B: $69,131 Total LCC Cost: $316,353 Does not include the cost of spares purchased LCC Results

  32. Conclusions • You must include Discarded or Consumable units in Total Spares required. • Whatever stock you have at the end of one scenario is what you will have at the beginning of the next • Remember that if a spare is discarded, you can’t use that at the beginning of the next period. • A reduction in Fleet size, does not automatically mean a reduction in spares or cost. • This method requires you treat each time period as it’s own model.

  33. Notes • Yes, This process works the same way when you already have AV stock to begin • With larger systems with more variance to the different parameters being used, you may not always arrive at the exact same number of spares vs discards, but you will be very close. • If your system has no discards, then use the same process; stock at the end of Period A = UDS stock at the beginning of Period B

  34. Questions? FIN

More Related