Poker Scale

  1. Scale poker is addressed. Several abstraction tech-niques are combined to represent the game of 2-player Texas Hold’em, having size closely, using related models each having size. Despite the reduction in size by a factor of 100 billion, the resulting models retain the key prop-erties and structure of the real game.
  2. Poker Scale Possibili popular casino table game is a natural for the online milieu. Play Poker Scale Possibili classic “21” or try any of dozens of Poker Scale Possibili.

DIVING STATUS is manufacturer of poker gauge and service provider of weardown measurements of tailshaft.

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The propeller shaft in the after peak tank is provided with inboard and outboard seals. These seals contain nitrile rubber or viton lip seal which seals against the bronze liner shrunk fit around the cast iron propeller shaft.

After a few years it creates grooves on them and naturally loses sealing and sea water can easily find its way inside.

This reduces the lubrication effect and creates wear in the bronze liner. Now as there is enough clearance the shaft will come down by certain amount because of the propeller weight.

This drop in propeller shaft is termed as “propeller stern shaft clearance” or “propeller shaft wear down”.

The reading is taken every dry dock and/or in-water survey in lieu of dry-docking and recorded. In order to take the measurement, we need to have access through the rope guard.

There are different access plates (open/accessible, bolted, and welded). Also, Special equipment needs to be provided from the Chief Engineer onboard, since each vessel has specific customized tools (poker gauge). This poker gauge is used to measure the propeller shaft drop.

Additional, make sure to turn the blade to one position refer to the marking. Normally, we take top measurement and bottom measurement. All measurements will be taken according to IACS standards.

Poker Scale

Actual bearing clearance will depend upon shaft diameter, lubrication type (oil/water) bearing material (white metal/synthetic or Lignum Vitae), and loading. Dependent on the factors mentioned above and Class requirements the maximum bearing clearance will vary. Oil lubricated bearings will have a maximum recommended by the maker – controlled by design limitations, stress, alignment and loading. The actual distance measured is less important than the change in distance.

The clearance between the propeller shaft and the bearing should be measured during each In-water Survey in lieu of drydocking

DIVING STATUS is manufacturer of poker gauge and service provider of weardown measurements of tailshaft.

All measurements (top and bottom) are taken according to IACS standards.

Effective estimation is one of the toughest challenges software developers face in their jobs. Regardless of team size, they need to define, estimate, and distribute work throughout a team. As teams get larger, it becomes even more important to build good habits around planning and estimating work. Lack of planning and estimating reduce confidence in a program, breaks down relationships between the team and the business, and makes development harder on everyone.

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The Accuracy of Group vs. Individual Estimation

According to some study on the accuracy of estimation of effort between individual and group in an experiment for a software project. 20 software professionals from the same company individually estimated the work effort required to implement the same software development project. The participants had different background and roles and the software project had previously been implemented. After that, they formed five groups. Each group agreed on one estimation by discussing and combining of the knowledge among them.

Result – The estimates based on group discussions were more accurate than the individual estimates.

What is Planning Poker?

Planning poker (also known as Scrum poker) is a consensus-based, gamified technique for estimating, mostly used to estimate effort or relative size of development goals in software development.

Steps for Planning Poker

  1. To start a poker planning session, the product owner or customer reads an agile user story or describes a feature to the estimators.
    For example:
    “Customer logs in to the reservation system”
    “Customer enters search criteria for a hotel reservation”
  2. Team members of the group make estimates by playing numbered cards face-down to the table without revealing their estimate (Fibonacci values: 1,2,3,5,8,13,20,40)
  3. Cards are simultaneously displayed
  4. The estimates are then discussed and high and low estimates are explained
  5. Repeat as needed until estimates converge

By hiding the figures in this way, the group can avoid the cognitive bias of anchoring, where the first number spoken aloud sets a precedent for subsequent estimates.

Agile Estimation – Relative vs Absolute

An estimate is nothing more than a well educated guess. We use all the knowledge and experience at hand to make a guess about the amount of time it is going to take. So instead of looking at every new work item separately, why not compare it to previously finished work items? It’s easier for humans to relate to similar items than to guess the actual size of things anyway.

For example, is it closer to this really small thing? Or is it more like this normal sized item? Or is it really huge like that one piece of work we finished last month? Doing relative estimates will not only reduce the amount of time spent on estimating work, it will also heavily increase the accuracy of the estimates.

Our brain is not capable of doing absolute estimates; we always put that new thing that we need to estimate in relationship to things we already know.

Poker Scale

Poker Scale Possibili

Fibonacci sequence and Planning Poker

Planning Poker uses of the Fibonacci sequence to assign a point value to a feature or user story. The Fibonacci sequence is a mathematical series of numbers that was introduced in the 13th century and used to explain certain formative aspects of nature, such as the branching of trees. The series is generated by adding the two previous numbers together to get the next value in the sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, and so on.

For agile estimation purposes, some of the numbers have been changed, resulting in the following series: 1, 2, 3, 5, 8, 13, 20, 40, 100 as shown in the Figure below:

The Interpretation of the point assigned to a poker card is listed in the table below:

Card(s)Interpretation
0Task is already completed.
1/2The task is tiny.
1, 2, 3These are used for small tasks.
5, 8, 13These are used for medium sized tasks.
20, 40These are used for large tasks.
100These are used for very large tasks.
<infinity>The task is huge.
?No idea how long it takes to complete this task.
<cup of coffee>I am hungry 🙂

Point vs Hour Value in Estimation

So why use story points instead of time values? Story pointing allows the team to focus on the complexity and time involved in delivering a piece of work. The team compares the new work against work they’ve already done. They compare the complexity of the new assignment against past challenges and rank the difficulty as well as the time required.

Poker Scale Winning Hands

For example, we don’t often account for “the cost of doing business.” Meetings, email, code reviews, etc. with time values. But in reality, all these are necessary practices throughout in our daily life, but don’t actually count as “work.” Story points isolate the software development work from the associated logistic work items, so estimates using point based should more consistent than hour base approach.

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