Monday, May 29, 2017

Job Shop Scheduling Problems and Challenges

Job Shop Scheduling - High mix low volume job shops and machine shops can be quite a challenge to schedule.

  Why?  Here are just a few of the complex problems and challenges that plague the environment:Job Shop Scheduling
  • Bottlenecks or constraints in job shops can move based on the volume and type of work.
  • Work is diverse -- typically low volume high mix but a production job may be run on occasion, or prototypes will be in the mix.
  • Jobs are typically made to order, but there are some job shops that may make a stock part, in addition to, custom parts.
  • While producing new custom jobs are the norm, some job shops and machine shop will do repair work.
  • Shops may do some amount of on-site new work or on-site repairs.
  • Emergencies can be fairly common and can take a fair amount of capacity (2% to 30%) and be very disruptive.
  • For some shops, customers call and make changes (frequently) - dates, quantity, or change their order completely.
  • It's common place to have employees which are not cross trained at all or cross trained very little so the skill needed isn't always available.
  • Shop employees don not always show up for work or on they may not show up on time.
  • Set-up times can vary and some set-ups can take a substantial amount of time, while others take very little time. And, what's worse, is that both scenarios can occur in the same shop and at the same time.
  • The high mix low volume nature of custom job shops leads to a mix of jobs with all different quoted leadtimes.
  • The touch time to complete a job can also vary wildly. The same shop can have very short touch time jobs and at the same time have very long touch time jobs and everything in between.
  • Due to precision and/or tolerances, certain jobs have to run on particular machines, making scheduling a problem.
  • And if those weren't problem enough, some jobs have outside processing to be done and some don't. Some have more than one outside process to be and some have none.
  • The leadtime on necessary outside processes will vary by the process and the vendors do not always deliver when they promised.
  • Yield rates are not perfect -- they may not be 100% or quality issues can play a role depending on the precision and type of work.

And, regardless of all these problems that can occur in scheduling a job shop and often do, customers still want their job done on time.

Now you know why it's so difficult to schedule a custom job shop.  It is the nature of the beast. There is a solution -- it is called the Velocity Scheduling System. It was developed for highly custom job shops and machine shops where these problems and Murphy not only exist, but thrive. Velocity Scheduling is NOT software but a visual scheduling system. It is a manual system that includes a visual planning board, as well as, a visual scheduling board. These boards are customized for your specific situation. Given all the complex challenges discussed above, you can imagine how important it is to customize any solution for your particular environment. To learn more, check out the ebook tab and the webinar tab. The ebook provides more information on the scheduling challenges and the traditional solutions while the 47 minute webinar provides the VSS solution. Best Wishes, Dr Lisa By Dr Lisa Lang This article is copyrighted by Science of Business, Inc. Visit our Re-post guidelines.

http://www.velocityschedulingsystem.com/?p=2311

Job Shop Scheduling Software

 

Job Shop Scheduling Software | Machine Shop Scheduling Software

I'm like you.  I invested in job shop scheduling software (we used to own a job shop).  Spent hours and hours getting it setup up only to spend more time continuallyJob Shop Scheduling Software updating the schedule.  Why does it seem that the moment I print the schedule it's out of date?  And the software itself doesn't lead to an improvement, a little time savings but no real improvement.

Job Shop Scheduling Software - it's NOT working!

There's no question that there is an almost unlimited number of job shop scheduling problems and challenges.  And the scheduling modules that are available don't seem to fully address these problems. To try and solve these problems and challenges, we tend to add more DETAIL. If what we're doing now is not working, we just need to work harder.  Right? We spend more time updating the schedule.  We add more information.  We update more often.  We invest in software or add a module to our ERP systems that provides a way to collect and analyze the data. But, adding more detail is not the answer. Here's an excerpt from a job shop scheduling software article on thefabricator.com.
Sources concede that job shop scheduling is just too complex for software to do all the work. “There is always going to be a human element to the decision-making effort,” Lechleitner said. “I think any APS (Advanced Planning and Scheduling software), at its best, will probably get you about 80 percent there.” Liddell agreed. “The software can do 80 percent of the donkey work, which will let the scheduler do 20 percent of the fine-tuning. We’re not trying to create the perfect schedule. We’ve never seen it work.” “I have not seen any magical formula,” said Richard Henning, president, Henning Industrial Software, Hudson, Ohio. “You need to monitor the skills people have for specific operations, what machines people are assigned to work on. These are all complex relationships. You still need a human being to help you see the big picture.”
And those guys are job shop scheduling software vendors.  But in their defense software just can NOT take into account all the variability that job shops encounter.  And yes I know there are some algorithms you can run (and rerun and rerun) that will balance your capacity.  But again, it's a continual updating of the schedule. It really doesn't matter if you're running finite capacity scheduling, infinite capacity scheduling, foward scheduling, or backward scheduling -- it takes constant managing and updating. I'm not saying that you shouldn't invest in the an ERP package or even a APS package, just realize that if you just do what you're currently doing a little faster, it's likely that your productivity will not increase, your lead-time will not reduce, and your due date performance will not get better.  And isn't that the point?

Job Shop Scheduling Software Solution

Velocity Scheduling System (VSS) is NOT software.  It is a visual, manual scheduling system that will work with your existing ERP or no ERP.  It is designed specifically for high mix low volume custom job shops and machine shops whose constraint can move week to week or even day to day and who suffer from a number of the job shop scheduling problems and challenges. VSS is implemented during a 14 week coaching program.  Each shop is different and the system needs to be customized for your specific shop and challenges -- therefore coaching is extremely important and boxed solutions are not used.  Results are realized typically in week 5 but it depends on how fast your team takes action.  (more details and our guarantee below is a shorter summary) We need a list of your jobs including their due date, internal process time estimates, and outside process times (if any). And don't worry if your estimates are not accurate.   That's to be expected in a custom job shop-- we don't need more detail!  We're using the information to come up with a "priority release order".  So as long as they are relative to each other, the order is close enough. By visually managing the jobs that are currently in process and on your visual scheduling board -  Velocity Board, you eliminate the constant re-scheduling. And the Velocity Board is not like any scheduling board you've ever used.  The details of how it works are proprietary, but you get all the specifics in the 14 week coaching program and more importantly we customize it for YOUR custom, complex shop. A good visual scheduling system will help you to see if you have any issues.  Nothing can hide and nothing can fall through the cracks.  If a problem arises, you see it and can deal with it.  There's no rescheduling to do.  There's no one walking around with a schedule in their back pocket -- it's a visual SYSTEM. Jobs that are not yet in process are on your To Be Released Board in "priority release order" so that you can visually manage your backlog.  One thing we like to view visually on our TBR Board is the status of "full kit" on the jobs waiting for their turn to be released. Another component of Velocity Scheduling System is what we call "Detailed Planning".  But detail in this case is much much less.  This is where we come up with priority release order (this where we interface with your ERP or whatever you use) that we've already discussed and then we look to see if there are any issues with that release order.  For example, if we release in that order might we encounter a constraint?  If we release in that order are we likely to meet our due dates?  We predict when each job will start and when it will be completed. We do NOT try to predict when each job will be on each machine.  That level of detail is very likely to be wrong and cause massive re-scheduling.  A macro view of starting and finishing is much more predictable. The order we implement is shown in the graphic below.  But before we get to that we need to make sure that you shop is a good fit.  So I recommend you watch the scheduling webinar which will provide more detail on Velocity Scheduling System.  At the end of that webinar, I'll Job Shop Schedulingexplain how we can talk to determine if you shop is a good fit and what results are likely.  And if I don't think it would work in your case or your results would not be big enough -- I'll let you know. THE key measure in Velocity Scheduling System is productivity.  The goal is to get more done with the SAME resources (the definition of productivity).  And, if you ship more without increasing costs -- your lead-times reduce, your due date performance improves, and of course, you increase profits.  All with less chaos and less re-scheduling. Sincerely, "Dr Lisa" Lang P.S.  Check out the solution to job shop scheduling software --> How to Get More Jobs Done Faster Webinar! By Dr Lisa Lang This article is copyrighted by Science of Business, Inc. Visit our Re-post guidelines.

http://www.velocityschedulingsystem.com/?p=2450

Sunday, May 28, 2017

FREE Special Report for Machine Shop Owners

Click the link below to download the free special report for machine shop and job shop owners titled:  "The 9 Biggest Challenges to Scheduling YOUR Job Shop and Why Most Schedules are Dead on Arrival!" by Dr Lisa Lang.
https://www.VelocitySchedulingSystem.com/ebook/
After you read this free special report, please CLICK on "COMMENTS"above and post your comments. I would love to know if you agree or disagree and your reasons!

http://www.velocityschedulingsystem.com/site/?p=296

Registration is LIVE!

www.VelocitySchedulingSystem.com Thanks for your questions, comments and feedback to the special reports and videos. Video #3 is in the works so stay tuned for that. As I stated in one of my first emails, I was looking to get your feedback so I could fine tune our system to make sure it was ready to release. And in the process, I would provide you some free content and longer explanations of how you could put The Goal to work in your shop. In Video #2, I challenged you with the first actions to take if you really wanted to improve your operations -- and some of you were even brave enough to take the recommended actions! The next actions are customized for YOU. And this is where the Coaching Program takes over. So we are now ready to open registration of the Velocity Scheduling System Coaching Program! With this system you will - increase your due date performance - decrease your lead-time - and, increase communication while decreasing chaos And more importantly you will do this WITHOUT a consultant camped in your conference room and certainly without the expense. We will guide you and your team through the steps to achieve these results -- and provide the coaching necessary to customize it for your situation. Why is this important now, when most of us have MARKET CONSTRAINTS? For 2 reasons. First to exploit a market constraint you must have your operations in order -- you need to have close to perfect DDP, you need to have shorter lead-times than your competitors, and you need to be able to guarantee these commitments. And second, if you need to cut people, the system will help you to determine where you can cut and have the least impact on your ability to deliver. So, if you're ready to take control and tackle your market constraint, it would be my pleasure to share our experience and provide the system and guidance necessary to make it happen! To register go to: www.VelocitySchedulingSystem.com

http://velocityschedulingsystem.wordpress.com/?p=132

Video 3 - Implementing the Velocity Scheduling System

In this 30 minute video I give you an overview of what's included in the VSS and how the coaching program will work. Then I interview a VSS Coaching Program client. This client was the LAST to get results during our last coaching program. But wait until you hear the results! And Ricky discloses an idea he used after cutting WIP but before his Velocity Board was up. You don't want to miss this! [embed]http://vimeo.com/13109539[/embed] Register NOW at http://www.VelocitySchedulingSystem.com By Dr Lisa Lang

http://velocityschedulingsystem.wordpress.com/?p=137

Machine Shop gets BIG results with the Velocity Scheduling System

By Dr Lisa Lang Tanya DiSalvo, President of Criterion Tool & Die, just sent me this email:
Lisa & Brad- We finished off our fiscal year end 10/31..... could have never turned things around w/out the V V S.!!!!!! We finished the year in the black because 'the board' helped us focus on FINISHING! The last 6 months also saw a serious improvement in on time delivery, and an increase in the volume of orders thru our building. We have accepted a long running project, and feel that the self releasing mechanism of "The Board" has allowed us to tackle this type of work effectively while still serving our job shop type customers. No job gets lost in the shuffle no matter how longs its in the building, and the resources (people) have become utility ball players! I have included a snapshot since May of our numbers. Jumped back into Mafia Offer training.... Got the itch to know more!!! THANK YOU! Tanya DiSalvo Criterion Tool
And here are some of their key meterics: [caption id="" align="aligncenter" width="441"]The Velocity Scheduling System helps this machine shop get on time! The Velocity Scheduling System helps this machine shop get on time![/caption] Jobs spend less time in the shop -- job velocity increases! Criterion ships more $ with the Velocity Scheduling System! Criterion has almost doubled the dollars out the door. If you ship twice as much and you don't hire anyone or buy any equipment -- what happens to your profits? Tanya is now working on Criterion's Mafia Offer. Because by implementing the Velocity Scheduling System, they have uncovered capacity. So the next step is to sell that capacity. If you need to get your operations in order, you can sign up here: www.VelocitySchedulingSystem.comIf registration is closed, you will have the opportunity to get on the waiting list to be notified if there is another session.

http://velocityschedulingsystem.wordpress.com/?p=281

30 Job Shops Improve Scheduling

30 Job Shops Improve Scheduling

By Dr Lisa Lang

In 2009 we significantly improved the scheduling and operations of 30 custom job shops and machine shops. These 30 shops improved due date performance (DDP) to at least 97%, reduced lead-time by 50%, all while improving communication and reducing chaos. Isn't it time for YOU to do the same? Here's an email that I was copied on just yesterday. It's from one of my VSS clients to someone he is recommending the course to:
Jose, This is the best system for Manufacturing that I have encountered. This is our next step in the cables shop and covers the entire value stream. It is a web based course that you take 2 hours twice a week for a month and the person walks you through your specific implementation and helps you through the problems. We are currently finishing the training and building the new board. Trust me I have seen and implemented many JIT, Lean Six Sigma systems in the past and this is the best. I have copied Dr. Lisa the creator and facilitator of the program. She is top notch. As well I am attaching one of her free reports on how the system compares with other systems. Sincerely, Luis Fernandez Schlumberger Manufacturing Engineer IPC-Cables
It's amazing what can happen when a team of people participate together and acquire a shared vision.
And did I mention that 3 of the companies participating in group 5 were from multi-BILLION dollar conglomerates?
And 4 of the companies in group 5 were Westinghouse vendors because Westinghouse recommended their vendors sign up?
I just laid out my recommendations, the logic and provided a little motivation.  They did all the work.
The next group is starting soon and you can sign up at www.VelocitySchedulingSystem.com.  The Velocity Scheduling System Coaching Program is based on Goldratt's Theory of Constraints.  So if you ever wanted some guidance putting The Goal (and Drum Buffer Rope) into action, now's the time!
https://www.velocityschedulingsystem.com/

http://velocityschedulingsystem.wordpress.com/?p=287